system
A chat on subreddit /r/wallstreetbets
human
Technically yes, but I doubt that it's making a dent in the DAU count over a quarter.

gpt
Ya that's my assumption too, but its hard to estimate without total user numbers.  
  
 Assuming its 186mm DAU, and lets say that represents \~80% of the total users, they could potentially add \~2.6mm DAU in a 90 day quarter with every message they send.