Quite true. I did not forget, but 'adserv' is pretty proliferate over the WEB, along with 'doubleclick'.
I figure people visiting the above site, will no doubt see similar sites increasing the odds of being tracked.
I err to caution about these things. There is also some other issues with sites who have 10 or 20 trackers. A high number of them also use ActiveX and are sources for spyware and malware programs. Not all mind you, but the odds of getting hit with spyware/malware are increased significantly.
If this site had spyware/malware, I would have removed the link.