[rollcat]

Same if you're building any OAuth-enabled client from source.

(Remind me, what's stopping me from extracting the client secrets from the compiled binary, and re-using them elsewhere?)

[yrro]

The provider might notice that their key is being used in an unauthorized way and terminate your account, prosecute you for computer fraud and abuse, etc.

[gaius_baltar]

I think this is the only assured way to interop, as I expect Google may try to kill other competing apps (specially in mobile) that does not capture user data or generate data points for its ads.

I wonder if any intentional limitation here should not trigger some of the EU Digital Services Act provisions for interoperability ... in this list [1] I see Google Play, Maps, and Shopping but not GMail!

[1] https://en.wikipedia.org/wiki/Digital_Services_Act#Very_larg...