Why would you want to access the donator forum when it's completely dead? And you'd be easier just trying to become a mod to get access to it.
I think it would likely be somewhat interesting to see old posts that donators posted years ago. The fact that it is dead likely means that it does not have a lot of useless spam in there.
From what I can tell you have spent a
lot of time on this forum and only became a mod a few months ago. I am not sure I would be able to report enough posts that actually should be reported to become a mod.
+the fact that mods are always receiving a lot of "hate" by people when rules are enforced
+the fact that theymos would likely receive a lot of backlash if he made some that trades in accounts a mod (I can only imagine the uproar)