Unrelated to the REST API, I just installed your Clearspace app on my Android phone (Pixel 8 W/ GrapheneOS). I can't use the app without connecting it to my Google account and the app requires network permissions? (There are so many others on the Play Store that will sell your app usage data.) Sorry, but no.
The alternative is forcing users to create yet another account/password during signup. This always infuriates me as a user - especially in the days before iOS 18 when there was no password manager support on iOS.
It doesn't really feel like "forcing users into adtech surveillance platforms" if they're using Android - they already have a Google account it's literally built into the operating system.
The goal was and is to minimize friction and maximize security. For all the flaws of consumer subscription as a business model, it's beauty is that we don't have perverse incentives. Users pay us to protect their attention so we make money by being good at that. We don't have to or want to sell their data.
