I sometimes buy used, I more often trade new games back in to finance the next game.
I also lend out games to friends, sometimes give them away after I'm done with it.
Plus what better to do then play a game when the cable (and thus internet) goes out. It doesn't happen often anymore but I did unplug my 360 from the internet. It's so much nicer and faster now to start games.
So yes, will effect me big time.