The hyScore|analyze core API is optimised for editorial articles/text and content website URLs (full URL). You should avoid sending IP-addresses, technical URLs (e.g. like dynamic AdServer URLs, CDN and storage URLs like cdn3.xyzdomain.com) or any other URL which is not related to some content.
Simple rule: As less content on a website is available as more suboptimal is the contextual analysis. It is simple like that.
We recommend filtering upfront which URLs you want to be analyzed by hyScore|analyze. It can help you to save some costs too.
If you send URLs unfiltered, we'll block most of the problematic URLs, e.g. like ugly AdServer URLs, automatically (in status response: Blocked by hyScore). URLs that can't be crawled, because of the robots.txt settings, are returning "Blocked by robots.txt" in the status information.