I recently transacted with Mapco using my PayPal card. Mapco hit my card with the transaction plus an extra $50.00 transaction.
When I called PayPal, they could see it was bogus and credited my account.
The transaction was an overdraft and PayPal went to my backup funding to get the money on this and 3 other transactions after this. All four transactions bounced. PayPal credited my bounce charges that my bank charged and charged it back to Mapco. Mapco's bogus transaction ended up costing them an extra $128.00. Yeah!
So, PayPal is fantastic and I'll NEVER go to Mapco, again. Mapco will get lots of free bad word-of-mouth advertising from me. I'm not one to keep my mouth shut.