As you can see here this company thinks they can own the word “shill”.

https://alter.com/trademarks/shill-90700635

The company filing is called Shill Media and does not appear to have a website, social media presence, or anything else. 

While there is no evidence of wrongdoing, we’ve seen other companies file  trademarks for commonly used words. Occasionally this is to strong arm companies into paying for right to use the name.