Higaholic

HigaHolic is an appellation that describes longtime Ryan Higa fans, or people who watch Higa everyday nonstop.

History
Niga Higa has existed since 2006:

The word Higaholic was first seen on a forum about new Youtubers or internet celebrities. In a post, an anonymous person says that NigaHiga has been an inspiration and that he’s a true higaholic. In 2012, the word was posted on UrbanDictionary but removed a week later. UrbanDictionary officially affirmed Higaholic as a word in September 2013.

Impact
... one big YouTuber has discuss3 the word. (Updated 2017)