There's two different things:
1- keeping information behind a paywall.
2- keeping the verification to some people
OnlyFans success shows us that #1 works
We know that information could be broadcasted to the world, but still nowadays OnlyFans is a thing.
nostr:npub1gcxzte5zlkncx26j68ez60fzkvtkm9e0vrwdcvsjakxf9mu9qewqlfnj5z 's proposal allows to implement #1 well enough, and even adding #2 to it.
