This model makes every user moderate their own follow list: if you're transitively pushing spam/hatespeech/garbage to the people who follow you, they will unfol

This model makes every user moderate their own follow list: if you're transitively pushing spam/hatespeech/garbage to the people who follow you, they will unfollow you or be at risk of pushing the same to their followers. Upvotes are effectively 'vouching' for content, and so you should only upvote judiciously. Attention is the reward for moderation.