One of the newer advertising criteria is Frequency Caps. A user will only get X number of the same banners in any session. All of the major ad brokers (doubleclick, flycast, burst) are using them. This is done by user tracking with session cookies.
Has anyone played with rotating their banner code in this manner: switching from domain to ip address, and possibly to another domain (if available) in their banner code? What effect would that have on cookies? Would it overide cookies?
For example, if you are getting banners from "www.superads.com", you could change the code to the full numeric ip address of "www.superads.com" and possibly to just "superads.com". Does IE treat those as separate cookies?
The reason I ask, is that I have one site that is incredibly sticky with enourmous per-user click averages (12), and I was just thinking...