Damn that's ill.  But I know rockstar is cracking down on people replying the high paying missions.  Violent ducks got bumped from 9k down to 3 because of everyone replayin it for the cash.  It wouldn't surprise me if they do the same to rooftop rumble. I also did a car selling glitch monday that netted me double the car price, but only let me do it like once every 24 hours or so. I think they patched it over though.