As a member, I don't see ads on this site. It looks like the pages are rendered differently for members than non members. I'd suggest just replacing the ads with either a static placeholder saying something to the effect that "Ads have been removed" or use the space to promote features of our site.
As leader of LC always have memberships, we also tend to be disconnected from our advertising schema and might not be seeing ways to improve it or how site changes might be lowering advertising revenue.