yeah I think that's the idea behind premium upsells like Snort pro, Damus Purple. If you don't set the expectations, people will pay the bare minimum or nothing (with some outliers).
Discussion
Devs are not good at asking. Subscribe (or whatever mechanism) should be easy, and easily accessible.
I saw you guys are discussing placement for these things, so it seems like that's on top of the mind already. in-context and feature discovery prompts are great. X also puts theirs in the sidebar and you can't close it unless you upgrade I guess. Or Ublock lol