Most aimbotters are caught by staff members and yet they don't get any rewards. For bug abuse, I mostly credit a player if he reports a bug in-game.
No need to reward players only for catching aimbotters, since if we start to do that, we would have to reward every report in-game. Just report in-game and we will do our best to get sufficient evidence to take actions on any rulebreak, that's what staff is for.