Of course there's the "follow the money" issue, I wonder if it's doable using a payment provider in a dubious country, or if Visa/Mastercard would just chargeback, leaving the payment provider to be mad at you (but hopefully they did poor KYC so they'd have no power to send their henchmen to you).

Maybe the fake app can say "Now you need to go to walmart.com to buy a gift card and enter that gift card code's to pay for parking", but that would filter out a lot of people who was looking for convenience in the first place. If I were consulting for this criminal, I'd say "You need to get to their greed by offering them a big prize, e.g. 1 year free parking in $CITY...".