Interesting idea, but… That will lead to:
1) The opinions of the rich will count more than everyone else's because they can give other people the most sats.
2) Circle jerk schemes where you give me 10,000 sats and I give you 10,000 sats - which comes out meaning nothing and is a scheme that can be used by scammers to make themselves look legit.
(Sorry for being pessimistic.)
Better, IMHO, is unpaid endorsements/testimonials… "I've known Joe for over 10 years - he's one of my dearest friends". It could be its own event type and could be ordered by whether you follow the person. One industry board I'm on has this and it's great. When you see obviously legit people endorsing the person it gives you confidence in interacting with them.