Dialyn: Maybe they're planning to change the membership plan again and don't want any legal hassles with those who pay by credit card. It's like the old apartment lease thing. Once you go month-to-month, you're susceptible to rent increases, but with an annual lease they can't jack the rent up on you again.

Poser 2, 3, 4, 5, 6, 7, 8, 9, 10, Pro 2014, 11, 11 Pro