It works fine with sites like fansly and onlyfans. 'creators' lock their posts behind a subscription or a tip, you tip and get access.
Reddit has the same, with awards (although they keep it all for themselves) Twitch has the same with points etc, it's here.
All you do is top up your wallet, scroll your feed, see a post you like, press the tip button send them a $1 (virtual points from your account to theirs) then they can cash out.
The hardest thing is making sure you're not falling afoul of the money laundering laws or accidentally financing 'terrorism'.
Hopefully we see more of it on the mainstream platforms, but on other platforms it's been here for years already.