I still like very much goughys idea. Get some kind of reward at each 1k games after custom belt ( achievement or item or idk, somthing ). This would make people play, because they are geting somewhere. Idk what this could be but i find this a good idea. Maybe make 10 new achievements for 20k to 30k, and 2 new achievements for 30 to 35 and 35 to 40 and them over again from 40 to 50 and 50 to 55 and 55 to 60k games.
And maybe some bigger reward at 30, 40, 50, 60k games.
Or unlock certain stuff, maybe discounts at some items, or new features. If all these ideas could be mixed in a intelligent way i'm pretty sure something cool would come up and expand the game after custom belt.

Sir, toribash is dead after u hit custom belt, there is nothing. I remember i was very excited when i was about to hit master belt and then custom belt and then....blank.