The moves only make sense if you know what game they're playing. In this case, there aren't any ads in the comments, so why would they want you to spend time there?
Of course there are ads in the comments, everything from sketchy plastic surgery links to even sketchier porn links to somehow less sketchy dick enlargement pills. The dick pill thing will still take over your PC and make it either a bot net or Bitcoin miner.
They're bereft of sense if you consider the goal of a good user experience.
If you set the goal as to have your user addicted and stay on the platform as long as possible, they're perfectly logical decision.