One of the big problems with using PayPal, from my non-BYOND development experience, is that it's easy to get scammed out of your cash. One of the games I've been running for just under a year and a half has had a pay-for-perks business model where players pay for a game currency and can then spend that in a special shop in game for the perks. The game has a lot of players from outside of the USA, a lot of which come from middle and south America (Puerto Rico, Brazil, Mexico, etc.) Without blanket sweeping any demographic, I'll say this: it's easier for an out-of-USA player to claim fraudulant charges on their credit card and get away with it, even when you can provide solid, documented evidence that the claimant willingly paid for the product. Then PayPal charges you $15 AND takes the money back from you - it's apparently your fault that you took a fraudulant credit card, so you're charged. This chargeback fee is actually coming from the credit card company itself, and heaven forbid they take responsibility for their own clients. So far I've lost around $635~ to this kind of fraud so far in that year and a half.
Game companies have wised up to this, however, and they've devised a new solution: offload the risk to another merchant. If YOU process the credit card transactions (or use PayPal) that puts YOU at risk for the chargeback. However if you can offload that risk to a brick-and-mortar merchant such as Best Buy, Blockbuster, or even 7-11, then you stay invulnerable to any chargebacks.
...provides one such service. You purchase the Zeevex cards from a local retailer and redeem them for points on your account. You then spend these points in a number of different online games for whatever perks/subscriptions you need. The risk is held by the original vendor (Blockbuster/etc.) while Zeevex and the game developer remain free of repurcussions.
Is this fair? Well, is it fair for credit card companies not to take responsibility for THEIR customer's actions? Why should businesses be burdened with charges stemming from their client's misbehavior and irresponsibility?
The virtual economics market is an interesting one, and I hope to see BYOND return to an automated subscription and payment model at some point in the future. I just hope they can find a solution that mitigates their risk as well.