As far as the ad is concerned, it's money in their pocket, so don't expect it to disappear soon. And while your complaining, how about all those sidebar ads....?
One of the supposed benefits of a paid subscriber site, is that when you pay, the bait is that you don't have any ads. That little benefit has somehow slipped by the people who run this site.
Look for it to get worse. Maybe if we all bail come signup time, they'll get the message.