Since spacehey includes user-submitted content, it's possible that:

* Someone uploaded a WEBP image to the site.

* Someone pasted a link with a utm_* param.

* The page was crawled when cloudflare was used.

Will look into it and see if I can find the pages that generated the tags. Search results are generally tagged by domain name (necessary since not all pages can be crawled, and even if the page the user connects to doesn't have, for example google trackers, a user would likely want to know if the site is using trackers elsewhere).

Also love the spacehey project, really captures the feel of Myspace!