Petra will have to pass your concerns up the chain to Stratics Central.
But, I will say this.
Something in a recent update to flash players, has significantly broken many existing sites that use flash. For example, many of the Flash-using games on Facebook, etc. are having significant errors and browser crashes (across all 4 major browsers) as a result of this. Given that Zynga's user base for Mafia Wars, Farmville, etc. probably is about the size of WoW's stated userbase, one can imagine the amount of frustration being vented on Facebook & Myspace for the last few weeks - and that's not counting the people playing non-Zynga games that are also having issues.
I also get similar errors on sites with flash-based ads, which may very well be the issue you are describing - even if the ads don't display due to subscription / membership levels!
In other words, I think the issue is much deeper than simply a single ad on Stratics.