A couple of years ago you could send people money, charged to your credit card, for free with Google Wallet.
Paypal charges you close to 3%, and the funds sit in someone’s paypal account until transferred out meaning there’s risk that Paypal may not allow the transfer (in the event they have a security concern). This can be really inconvenient, if they hold significant funds for any lengthy period of time.
Paying that much just to make a payment seems silly under most circumstances. Occasionally though you may find yourself in a pinch where it could be worth it, to push yourself over the top towards a bonus that requires a lot of spend or just because you need the convenience.
The fee is lower than Paypal’s, and the funds don’t sit in their account with potential restrictions on transfer out, so it may be safer. (Paypal is perhaps better-capitalized, but a credit card purchase transaction is going to have protections in the event of a problem there, even.) You also don’t need your counterparty to even have a Paypal account. They’ll also make electronic transfers.
They accept Visa, MasterCard, and American Express.
So this could be strategically useful for some.