|
Tracking between files doesn't even really matter. Do you think spammers insert tracking IDs in the links within the 8 million they send out in one sitting?
If traffic is down, just create more files, rather than trying to optimize the ones you are serving. It'd probably be more trouble than its worth to try to analyze and optimize your efforts even if there were a way to track it down to the individual file.
If you want some sort of statistics, you could try subdomains if you don't want to pay $8 a pop for new domains.
|