Best way to make small fund transfers online?
I have recently started a small side gig running RPGs for money. I am currently talking with some clients about an ongoing online campaign, which I have never done before. As a result, I am looking for a way to set up an online system to receive small payments (less than $20) on a per-session basis. Does anyone have experience doing this kind of online business? What kind of services exist that can handle this sort of thing? PayPal? Google Wallet? Apple Pay?