Newbie73,
Welcome to the forum. Let me take some liberties by answering this question. How many methods of payment are there in the mystery shopping world?
In my experience there are five. Those are PayPal, direct deposit to a bank account, paper check delivered by mail, PayQuicker and giftcards. Nearly all MSPs will provide payment with one or more of the first three options. PayQuicker is offered by a very small number of MSPs. To my knowledge only one of those uses it as the only option (Ace). Another offers it as an option along with PayPal and a third option (check, I think). Gift cards are offered by only one MSP to the best of my knowledge.
Happily shopping Rhode Island and nearby Massachusetts and Connecticut