Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Will a credit card issuer cancel an account if it never incurs interest?
No, they won't cancel it because you pay your card on time.  When a company offers a promotion like that they are banking on making money on average, not in every case.  On average including all the benefits including transaction fees, deals for partnering with best buy, etc.  Of course some people pay their credit card in full each month and never incur interest charges.  However, credit card companies more than cover that with other people who aren't responsible.  If it wasn't worth while they would end the card program or change it.