Ironic, but it looks like a new release actually drives player numbers DOWN for a bit. I suppose its due to increased hardware requirements? I also can't help wondering about the release dates of certain popular aircraft, and how that may have impacted player numbers.
I distinctly remember the system requirement quit posts from both AH2 and AH3. Both times a lot of "Welp, guess I'll quit posts" we're seen.
Missed an important one:
October 28th, 2008.
HTC announced the abandonment of Tour of Duty.
Not sure how important it was, but I'd be lying if I said I wasn't a little bit disappointed - but I'm still here
Friday Squad Ops used to be called Tour of Duty - and we even changed the name to Friday Squad Operations when Tour of Duty was announced or sometime thereafter.
Most of those game play settings became available for the players like you to tinker with and it allowed me to have some fun times in the SEA. I Need to start running those again soon.
I think there are lot of factors in the decline of numbers. Game Age, Game Development, Player Age, Subscription Costs, Game Competition (WT, IL2BOX, DCS)... No point in rehashing it.
I think the biggest thing that could help is social media sharing gameplay video. Some tweaks to camera views and in flight recording would go along way into making good gameplay videos.