Yep and add blockers don't stop them. I guess they are integrated into the web page. It has become as bad as the Blaze before they lost most of their advertisers.
A while back in the comments section at The Register someone mentioned that there are some websites that defeat blacklist-based ad blockers by channeling their ads from the real sources into their main domain. The solution is to block active content from the main domain by not whitelisting it in a whitelist-based blocker (or by strong security settings in the bowels of the browser). Except when I'm at a handful of trusted sites, I have NoScript in full-block mode and therefore have probably been to such sites but not noticed the problem.