Do musing has bots that autovote questions and answers after user posts?

There is no any such bots that gives us upvote on our answer and question if this happen then there should be some criterion such as the Grammer mistake should be detected and also the way he has wrote the answer as well as it should be attractive that it can be answer in a proper manner.

In my opinion any research on musing I had didn't see any bot which give auto upvote on any blog.