I get 2% back across the board from Citi, so I think that's how they encourage more use. I doubt that reducing interest rates gets more people to use their cards. I would think Citi is getting plenty from my transactions otherwise they wouldn't offer the kickback. I pay everything I can with the Citi credit card. Overall, it amounts to a decent kickback. I pay it off every month. My credit usage is high and that's part of the FICA score. So, I'm experimenting with making two payments per month; one in time for the monthly billing and another halfway through the month. The idea is to keep my balance low. I've read that can improve FICA. I'd think it was overall usage not the accumulated balance but what do I know. Still, it's an experiment. Not that I need a better FICA score, but maybe I can game their system.