system
A chat on subreddit /r/wallstreetbets
human
You need to own the stock before ex dividend date to be eligible for it.

gpt
I know that. But the way you explain it, makes it a free money trick, even without the dividend. 
  
 - Buy after ex dividend date, for cheap.  
 - Wait till it goes up again, sell.  
 - profit 
 - rinse and repeat with the next stock.