At the same time, that trick cannot be used in URLs used in paid search, at least not for Google AdWords. The redirect in Google AdWords will strip out the hash tag portion during the redirect and the visit will not be identified as a paid search visit.

In terms of this post, a possible alternative to not breaking your SEO rankings is implementing tracking your WT parameters via the hash tag instead of adding it to the regular query parameter list. For example, “index.htm#WT.mc_id=cid” instead of “index.htm?WT.mc_id=cid”. This can be done by adding a small snippet of code in your WT base tag to parse the said hash tag parameters and pass it to the page tag image.