Coin is a wonderful carrot; just be sure that you're reinforcing the behavior you wish to see when hanging it out there. Reinforcing spammy behavior will result in more of the same.
I wouldn't expect many people to tip spammy or trolly posts, but it's fine for that kind of content to be posted if our goal is to max out a block. More positive content = more tipping
I agree if people would like your content they will definitely tip you a lot. Not included those spam post.
