https://bitcointalk.org/index.php?topic=38071.0I 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.