They aren't paying with the products they buy online with their customers CC though. That's what I was getting at. Since they don't have access to their customers CC on the websites they're purchasing these services/items from they are having to pay with it and then get reimbursed essentially with their "convenience fee" on top.
Realized what you meant and deleted and revised my comment. In any case, I can't imagine their personal credit cards handling any actual volume, not to mention the fraud protection issues with orders for deliveries all over the country.
This data goes to Stripe, where Magic bills you. Magic doesn't use your card info to order the services for you. This is why this idea won't work - it's going to get overrun with chargeback fraud and totally ruin it.
