To everyone who refuses to update their payment using the provided methods (myself included), there are probably some things you should know. SE will not offer another payment option by the end of the month. Depending on how this goes for them, they might never offer another payment option. Giving us choices costs them money, so they need to justify their costs. That's just good business. Angry posts on the internet prove nothing. In fact, many of the people who claim to be quitting may be lying and you'd have no way of knowing. As such, SE will wait until after the end of the month. Once they find out how many people refused to update payment out of protest instead of just ignorance over the transfer, then they will make a decision as to whether or not it is in their best interest to seek new options.
So ultimately what I'm getting at here is: If you want SE to offer you alternate methods, you have to be willing to quit FFXI for several months. Holding out until the last minute will not do the trick. Find some other games you've been wanting to play and occupy your time with them (might I suggest Skyrim? It's coming in November.) Heck, maybe even get a temp job to fill the time and make some extra money while you protest these changes. But don't expect to get what you want just because you made an angry post on the internet. They're playing hard ball. You have to show them you mean it.
Don't worry, it won't be all that hard to catch up on everything if/when you come back. FFXI is still on easy mode, and content from patches has been pretty low lately. But if you want changes, make the decision now that you're quitting for 3+ months.