There's a few reasons for people to do this, none of them good. Some are selling a service and doing paid carries or recoveries for hard cash. They will do whatever it takes to get the money. The other is just sad sack losers who must win at any cost. Part of their self esteem is no doubt tied to their abilities on the game. Competition can bring out the worst in some people. I've seen plenty of cheating in the R/C car racing world. Some people will do anything to get that 10$ overgrown bowling trophy. It's an expensive hobby. Some guys will put a $1000 into their cars/equipment. They then feel entitled to win.