system
A chat on subreddit /r/wallstreetbets
human
The line they asked about in the screenshot that references the $167.50 options says '75 Buys'.   I do see now it also lists total number of contacts above the in the screenshot.  So 75 buys in the robinhood app definitely just = 75 long contracts.   
    
 'Buy' is an action,  not a position.   To me they have it displayed really weird

gpt
buy = long 
  
 sell = short