In upcoming update post publisher have to predict the post views and he will only get benefit if he predicted right 

Post prediction from publisher 

Publisher can also become promoter of the post if he predict post views before publishing the post 

Minimum Views 

You can minimum predict 10 views if you're the first promoter and will get 1 extra reputation point if post goes for 11 views 

Purpose of earning reputation points ? 

There's still a question mark in my mind about reputation points, What's the benefit of having more reputation points? 

Buying a post gives us half of the share from post income and we can earn bbs tokens from that post income but promoting a post just give us reputation points but I think there's no benefit of having more reputation points