Skip to content
HomeVideosBooksBlogs
AllTop postsTopics
Podcasts
HistoryListsWatch laterLiked videosFollowing

The videos, books, blogs and podcasts Hacker News keeps recommending, all in one place.

VideosBooksBlogsPodcastsAboutPrivacySettings

Data from Hacker News, HackerTube, HackerBooks, HackerBlogs and Open Library. Credits · Not affiliated with Y Combinator.

HomeVideosBooksBlogsPodcasts
Ctrl K
    M

    Margins

    readmargins.com · Personal blog · on HN since 2021

    Margins is a newsletter by Matt Levine-like finance writing, covering tech business models, venture funding, and market events such as FTX and SVB.

    Visit blogHN submissions
    Finance & InvestingBusiness & StrategyTech Industry
    What HN says

    HN commenters call its DoorDash pizza arbitrage piece a great read and praise its explanation of the SoftBank business model.

    Stats for nerds
    47HN people shared it
    33linked in comments
    634story points
    Jan 2026last shared
    2021people per year2026

    Top posts on HN

    1. 1
      DoorDash and Pizza Arbitrage (2020)
      18 people · 400 points · first shared 2021 · 230 comments on HN
    2. 2
      Why are maps so hard to make?
      1 person · 115 points · first shared 2022 · 96 comments on HN
    3. 3
      Elon's Giant Package
      1 person · 37 points · first shared 2022 · 40 comments on HN
    4. 4
      FTX and How to Lose Money
      2 people · 33 points · first shared 2022 · 41 comments on HN
    5. 5
      ZIRP Explains the World (2020)
      3 people · 13 points · first shared 2021 · 3 comments on HN
    6. 6
      Technology and Grieving
      3 people · 7 points · first shared 2024 · 1 comments on HN
    7. 7
      Alexa, What Happened?
      3 people · 5 points · first shared 2023 · 1 comments on HN
    8. 8
      Google vs. ChatGPT told by aglio e olio
      3 people · 4 points · first shared 2023 · Discussion on HN
    9. 9
      Is SOC2 the new tech protection racket?
      1 person · 4 points · first shared 2025 · Discussion on HN
    10. 10
      9.2% and the Master of Twitter (Margins)
      2 people · 2 points · first shared 2022 · Discussion on HN

    What HN people wrote when they linked it

    • to11mtmJul 2025

      > Why can't the takeaways just go rogue and offer independent deliveries?

      Because many of these delivery 'ad-hoc contractors'[0], sometimes even eating cost [1].

      Pre-covid, you were often best off as a business either doing something that was 'known' to be delivery offered (i.e. pizza) or your next best option was to aggressively advertise it and have an extra staffer on hand willing to do the deed.

      Then, you've also got the other form of arbitrage (or perhaps a cost thereof), of smaller independent restaurants/chains being unwilling or unable to handle the costs of properly covering drivers [2] and their pay when not driving [3].

      Some restaurants started doing delivery during covid and kept it going. However most around here dropped because the volume wasn't worth it to them, on top of the 'streamlined flow' (don't need to give a route, the app the person picking up the 'pick-up' order is handling, does that for them.)

      I'm not saying I like it but I get how it got here.

      [0] - Remember that in the early days some of these companies would do all sorts of weird things like just have someone order on behalf.

      [1] - There's an article about this involving 'pizza arbitrage' here https://www.readmargins.com/p/doordash-and-pizza-arbitrage

      [2] - To be clear, both the startups as well as locals have a checkered history when it comes to proper coverage...

      [3] - One can argue that such a person can be made 'useful' during the waiting time, however it becomes a complicated…

    • ceejayozMar 2022

      > The restaurant voluntarily entered a relationship with that food delivery company though??

      In many cases, no.

      https://www.eater.com/21537215/restaurants-sue-third-party-delivery-service-grubhub-for-listing-businesses-without-permission

      > Grubhub has explicitly made this false partnership part of their business strategy. Last October, CEO Matt Maloney said the company would be piloting a new initiative of adding more restaurants to its searchable database without entering into an official partnership with them, so customers would believe they had more delivery options with Grubhub, and wouldn’t switch to competitors.

      Re: your edit...

      > To be charged a 30% fee...

      If you don't have a deal with them, they can raise prices to get their cut. Shitty customer experience; they'll likely blame the restaurant for gouging them. Same if they list items not available from an old menu; restaurant gets blamed.

      There are some funny arbitrage opportunities with the non-consensual listings: https://www.readmargins.com/p/doordash-and-pizza-arbitrage

    • hintingNov 2021

      Felt | Frontend Engineers, Elixir Engineers | REMOTE | Full-Time | https://felt.com

      Felt is the best way to make maps on the internet. It's surprisingly hard to make a map today, and people in 15+ industries rely on them to do their jobs. Felt is the first easy-to-use collaborative mapping app, designed particularly to help with climate-related disasters like wildfires and hurricanes. Think "Figma for Maps".

      We're founded by me – the former founder of Remix, which we sold for $100M [1] – and my co-founder Can who you've probably heard of [2].

      We're particularly looking for great front-end folks who want to build a multiplayer experience on the web. Our FE stack is built using React, Jotai, Stitches, and a lot of other designed-to-be-fun technologies [3]. Ask us for a demo, it's hard not to love it!

      Learn more and apply here: https://felt.com/careers

      1: https://techcrunch.com/2021/03/09/via-buys-mapping-startup-remix-for-100-million/

      2: https://www.readmargins.com

      3: https://www.felt.com/blog/multiplayer-prototyping-tools

    • thow-58d4e8bApr 2022

      This is the best write-up of the Softbank business model:

      https://www.readmargins.com/p/softbank-robinhood-and-a-margins?s=r

      In short, the background of Softbank founders is in plumbing of the financial system. They intentionally bid up dubious companies into obviously unsustainable valuations, with the aim to make them highly illiquid. Faced with illiquid stocks, many of the assumptions behind trading models break down, and obscurities of the financial plumbing come to fore - the water Softbank knows really well. Eventually, index funds include a portion of the bid-up companies on their balance sheets, FOMO investors roll in - that's when Softbank unloads their bags

    • politelemonJun 2024

      The original post that BBC links to has more interesting details. https://www.readmargins.com/p/doordash-and-pizza-arbitrage

      Is this actually legal or is it a gray area that nobody has challenged at all? All I'm seeing is the restaurants themselves suffering the most, or left holding the bag - and it even seems Yelp is knowingly aiding the deceivers.

    • absdafsdvgvSep 2022

      DoorDash also sets prices independently of the restaurant menu. In some cases this means DD prices are higher than the store, in others DD prices it lower than the restaurant, and takes a loss in hopes of gaining market share.

      This results in fun opportunities like Pizza Arbitrage
      https://www.readmargins.com/p/doordash-and-pizza-arbitrage

    Related

    The Marginsthemargins.substack.com65 people

    Doordash and Pizza Arbitrage

    The Margins
    Publication · last shared 2021
    Baremetrics Blogbaremetrics.com120 people

    I sold Baremetrics

    Baremetrics Blog
    Company · last shared 2023
    Groove Bloggroovehq.com106 people

    Signs that a startup is focused on stuff that doesn’t matter

    Groove Blog
    Company · last shared 2023
    Bull Marketmedium.com/bull-market48 people

    How Gyms Make Money (2015)

    Bull Market
    Publication · last shared 2026
    Matt Stollermattstoller.substack.com231 people

    WeWork and Counterfeit Capitalism

    Matt Stoller
    Personal · last shared 2023
    ProMarketpromarket.org80 people

    “Google Is as Close to a Natural Monopoly as the Bell System Was in 1956″

    ProMarket
    Publication · last shared 2026
    RyxCommarryxcommar.com32 people

    Zillow, Prophet, time series, and prices

    RyxCommar
    Personal · last shared 2025
    A List Apartalistapart.com667 people

    The future of web software is HTML over WebSockets

    A List Apart
    Publication · last shared 2026