I realize this becomes a big issue with zaps being removed from the AppStore, but it could still be accomplished with the PWA. But have you seriously looked at using a "split zap" default for app users yet? I'm more than happy to contribute but I very rarely do (its when these sorts of posts come across my feed) because its impossible to remember all the people I need/want to support. I would 100% do a monthly fee for the relay, but I am genuinely curious if a default zap split from the client could be a better means of support that feels much lower friction for the user. I *know* I would use it and I also still have a bounty of 1Mil sat for anyone who will implement this for their relay. I can raise it to 2Mil if that will get you to just try it. That's at least your monthly server charge covered once.