When viewing question page as anonymous visitor or low rep user, we are presented with advertisements on top of the page. All is good.
90% of those ads belong to Careers, which is also good.
90% of the Careers ads are served via adzerk, e.g. this one: (full link)
However, 1 out of 10 times I get such and ad, which is just a plain image which directly links to http://careers.stackoverflow.com/:
I don't have anything against the ad itself which is nice however, I see possible issues with this:
- The normal ads open the target site in a new tab, the direct non adzerk ad in the same tab. It can be unpleasant surprise.
- In the normal ads, I can click "like" or "dislike" and it affects how often I'll see them in rotation. The direct ad, being plain image, doesn't have those icons.
- I assume adzerk is used for a reason, e.g. tracking popularity of ads, so Stack Exchange is not getting this information for those direct ads.
Is there a reason behind this? Or just some oversight?