The @toly and @sgoldfed debate on Robinhood chain economics comes down to one question: breadth vs. specialization. If you think the first-party Robinhood apps will be the most used ones, and you bring nearly all the users who transact there, then Solana is the cheaper backend. What you pay Solana in REV is probably less than Ethereum + 10% to Arbitrum, and the front-end fees you charge can equal or exceed Hood's net REV either way. But if you think you can be the tollbooth on a large economy building on your own chain, breadth wins even at a lower take rate, because you collect gas on every app that deploys, whether you built it or someone else did. So it reduces to: do you gain more from network effects by building on someone else's chain, or do others gain more by coming to build on yours?