Well, I lurk mostly in the games section as well - but oft times I try to sneak a peek at the general discussion. But that’s kind of ancillary, no? It’s not the MAIN theme which is getting butts in chairs in front of the forums here, yes?
In 2004 AAR was released, we probably saw a spike then as it was the first TRUE reincarnation of the game (yes there were theater specific versions, but lets face it, the real heir to the empire then was AAR, then Anniversary, then Global 1940.)
In 2007 the Axis and Allies Minitures (specifically the expanded rules) was revamped (Source: Wizards of the Coast’s own webpage, google it!). It has felt like minitures were kind of the new foundation of the site (dont ask me why, I dont even want to know why it’s different than the board game which - coincidentally HAS MINIATURES ON IT!) so that might explain the sudden influx at that time.
Also, I cannot remember exactly, but we had political discussion back then. We had a lot of NON-gamers (Falk, et el) on here stirring up trouble and not producing a dang thing for the community (AFAIK, they were worse than the spammers.)
Now a lot of us are growing up, this isnt 1999 anymore (my first account was made in 1999, I lost the password so I had to make a new one, but the rip fest on Gore/Bush was fun as heck back then!) so we just gotta figure peeps left, taught their kids, or maybe play one game by tripleA or forum or USPS, who knows.