Are the contributer prices still up to date or are they from when the price was @ 10$?
The Donator/VIP tag prices are in BTC and they are not pegged to USD.
The prices won't be reduced. They may be increased if the BTC price gets really low. Additional lower-price statuses may be created later. I don't want to manually deal with too many payments, though.
I intend to add new, cheaper donator ranks. I won't decrease the price of the old ranks, though I may rename them (to "Donator+" and "VIP+" or something like that).
I said a long time ago that the prices would remain the same, so I can't change this policy now in any case.
Are the new ranks' price going to be variable or adjusted every x days or months depending on BTC price?
Maybe. I haven't thought about it much yet. The forum doesn't need donations, so I'm not going to create another donator level soon.