Setting aside the legality of this, is it even possible for credit card companies to work with rates capped like that? I'm sure the credit card companies are p

Setting aside the legality of this, is it even possible for credit card companies to work with rates capped like that? I'm sure the credit card companies are plenty profitable right now and could probably afford some kind of cut. Just the transaction fees alone seem disproportionate to the costs. But they do have to cover things like defaults, the opportunity cost of the money, fraud (they have to eat the costs of identity theft under the Truth in Lending Act), etc. Clearly they're turning a profit at 20%; can they still at 10%? At the very least, I suspect some people will find that their credit cards are canceled.