With growing Steem Power I see these comments now more often under my posts as well. But I have a simple and very effective method for them: I upvote ALL comments under my posts which are not rubbish. All those that don't receive an upvote are rotting on the bottom of my posts. Without saying a word people are picking up on that and start learning. It is very profitable to engage with me on a daily basis in a non-spammy and non-begging way.