Both 1 and 2 will simply incentivize people to make fake accounts or pay existing account holders to post for them.

I think 1 and 2 will destroy social media as a frenetic place where everyone is competing for attention. It will become boring without all the battles, pile-ons, gore and porn being shoved in your face. People will sometimes check in to see what Obama said. That's about it. At least that's my hope.