I did notice that too that's why each time I start a discussion (topic) I do leave room for contribution from other members to make that thread interactive not that I don't have all the point needed for that topic to be perfect. Also I prefer replying to replies in threads instead of OP unless it's the type of topic that needs direct reply. Again looking at these users post history you can easy identify those shitposters (mainly posting because they are paid to) even though their post have some little sense to it, they just move around the forum replying in any board they find discussion they can contribute to but the average none shitposters post history are always similar in regards to boards and sometimes threads he/she posts in.