Works for the Xbox and the PS3 system.
Step 1: Earn 10,000 COD points (for high roller)
Step 2: As your in the pre-game lobby spend your money on your playercard (Emblem or Title)
Step 3: Just come in the top 3 and you just earned some COD points
Whatever you dont spend will be added to your buy-ins
For example you have 5,664 Cod points left, that will be added to the games buy-ins
I didnt see this anywhere else so until further notice im taking credit for this glitch.