We ask for the cc now, but then still get a final confirmation before charging. The idea being that we won't charge you for forgetting, but you are also showing

We ask for the cc now, but then still get a final confirmation before charging. The idea being that we won't charge you for forgetting, but you are also showing some interest by being willing to put the card in, and when it comes time to decide to pay, it's only a button press away and they don't even have to dig out their cc.