My opinion is that it is the same as trolling...simply to piss people off anonymously. No one can gain anything by having a good internet chess rating lol, so I agree that simply winning isn't the main motivation.
The Real Motivations of Chess Cheaters

What are the real motivations of brand new members who have not played 1 game on this site, but the're 1st thread is about cheating???????
Why do cheaters do it? It's not just to win. There are simple explanations that nobody has ever presented to the community.