Re: Enhanced Sitelinks
Good question. Yes, third-party tracking URLs can be used for Enhanced Sitelinks.
With regard to Enhanced Sitelinks, we will attempt to match the final URL for your Sitelink URL and ad URL. If no match is found, this format may not show. None of your URLs will be changed, so this will not affect your reporting or users' experience getting to your pages.
Our final matching between sitelinks and ads is on the final URL after removing tracking parameters and has nothing to do with the content of the pages. However our system might not always be able to identify these parameters and it is not possible to predict with certainty at this time whether the system will find a match or not.
I hope this helps.