Most of it will be destroyed. I know for a fact that when B&G delivers the new material, they also take the 'old' chips and plaques and they will destroy them for the casino.
Also many casinos destroy it them selfs. They take it to the insinerator among other things.
I know it is sad, but you see even Paris Las Vegas destroyed their French table jetons and plaques.
I try to get more scans and news of who already have the new material
Kind regards
Bob R-4479 Belgium