Great idea. There are a few sites whose implementation of PayPal causes serious friction because they let you log into PayPal, but then they want a debit or credit card. These implementations refuse to let you pay with your PayPal balance. Often they are services that charge monthly. Perhaps it is easier for them to process, but I don't know why since PP supports recurring charges. Companies are losing a lot of sales online when they do not clearly state that they accept PayPal or claim they do, and then refuse to use the PP balance.