If you like a post, you can merit such post.
We have 'merit' system which serves kinda same purpose, but there isn't abundance of it so you gotta be careful where you spend.
The problem I see with that is that sometimes merits are given to a person for a post simply because you agree and I don't think that was the original intent of the system.
I understand that merits should be given for a thoughtful post or sometimes for being helpful or funny. Sometimes even a one-liner, if what it expresses is a key idea about what is being discussed is worthy of merit.
But giving merits simply as a like, as is sometimes done, I understand that it should not be done.
Anyway, the system is not perfect, but I understand that it is quite good.