Why not? We do not have 2500 active members. Not even half that. If people want to come back and actually contribute, then fine, they can make new accounts. And as for old threads, shit's gotta go somewhere sometime. We can cut the costs basically in half by doing some pruning.
From the numbers you've given us, that's about a thousand dollars a year, and it's only going to get bigger. We've already had to backtrack on site expansion due to technical difficulties, which I'm going to assume wasted monies as well. It's simply not practical to just continue growing and not attempt to cut costs. We have to think about the future, not hold on to archived shit from half a decade ago.
Brandon Rhea is a hoarder. He has trouble throwing things away....
Personally, I say delete everything from June 2007 and before. I mean seriously, who goes read old OOC threads from four years ago?