system
A chat on subreddit /r/wallstreetbets
human
Probably has to do with DIA having less market cap and exposure than SPY. Most of us come here to gamble. The smart people take advantage of those wanting to come here to gamble, and manipulate them in ways that they could never have thought of. (... selling options?) 
  
 I've been trying to spread (no pun intended) the good message of spreads but these people will do what they want. 
  
 Welcome to WSB.

gpt
what do you do spreads on?  I did TSLA a few times with calls or puts and had success. But I got BTFO when TSLA crashed. 
  
 I'm trying out AMD put credit spreads now.