If we're talking normal credit cards in the US, you technically are getting a 30 day loan for free, no interest if paid in full every month. I don't see a issu

If we're talking normal credit cards in the US, you technically are getting a 30 day loan for free, no interest if paid in full every month. I don't see a issue if credit cards charged 30d interest on balance, but if mine did that I would drop it instantly.