Zappos has been owned by Amazon for years now, and they still accept Paypal.
Thanks for the reminder. You're right.
Well, if anything then, this could signal that 'owning my digital content that's really owned/held by Comixology' means it'll be around longer.
I wouldn't be too worried about that. I remember when they acquired Audible they didn't change the payment system for a LONG time. I know because Audible wouldn't accept my debit card even after the acquisition yet Amazon would.
I'd love to think that this will stay the same, but I see lots of changes happening from this, most not so great.