If you look into the stats, you'll see most forums have been hit hard repeatedly. Just did a quick recap check of my competition and some random major forums: Everyone seems to have dropped.
I'm down from 180k a day, to 80k a day now. I've moved from providing 'free educational sites' that depend on using adsense to make a simple living, to branding up 'sales only' stuff. Much easier, lots more money, quicker rewards - plus it's easier to rank now.
It's a shame, I think the internet will be poorer for these changes. IMO Forums have practically zero chance of developing in this new Google - perhaps people's voices shouldn't have even been heard in the first place - as it was before the internet.