system
A chat on subreddit /r/wallstreetbets
human
I believe much of the runup was because people were buying the rumor of D4 being announced at BlizzCon. It's non-announcement combined with ATVI doubling down on moving to mobile with various statements post-BlizzCon and a poor earnings call is really racking the stock. 
  
 Far more than any fanboy rage, anyways.

gpt
Also Destiny struggles