If you're going to the regular battle.net site and not something special for beta, the payment option on mine looks normal. I didn't get a beta key yet though. It would be odd though if getting a beta key messed up your payment option.
I'm sure they'll get it fixed soon. If you have a beta key, just be happy. For those at the end, we're still hoping Blizzard doesn't change their minds on it.
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