<prompt> Human: I am thinking about moving from a no-rewards credit card to one with cash back rewards. I always pay my balance in full every month. No exceptions. Would a bank likely catch on an cancel it after a while? Id rather not have a cancelled card on my credit report.Assistant: ...what? I do exactly this. I get 2 back. The bank is thrilled. Whats the issue?Human: I doubt theyll be making any money off of me. Maybe they make it though the transaction fees to vendors?  <response>: Bingo. They make money on interchange. 