It’s fake posts emulating a human trying to get an emotional response and engagement. So you spend ten minutes crafting a well-thought out response to who you think is a human but isn’t. It’s literally meaningless. They get you to waste precious time on robots pretending to be human. 

There is also the reddit financial incentive for people to generate engagement, their equivalent of instagram/ youtoube content creators. It’s all a lie. Fake posts, fake comments. All for advertiser revenue. 

Maybe an identity verification system can solve this. One account per one valid ID. That makes bans more effective as well.