system
A chat on subreddit /r/wallstreetbets
human
Nobody actually answered your question about why the different strikes on same expiry. I do not have the answer. 
  
 Nvm apparently vertical spread or something. But still, why?

gpt
improved probability of success. it's another way of easing in or legging into a trade. i'd do this only if my prediction was winning, but hey this is wsb and risk management is for pussies