Mindless bots, I believe it's fair to say, are a scourge in team-based competitive games like League of Legends. Fraud is also, um, not cool. By revamping LoL's refer-a-friend program, Riot is hoping to squash both with one giant fly swatter.
Almost every shooter that's come out in the past decade has had to acknowledge the meteoric rise of Call of Duty and the fast-paced, twitchy sort of competitive gameplay it's popularised. Now, that influence seems to be slowly fading.