system
A chat on subreddit /r/wallstreetbets
human
I have, with an alternate account, but it's just a lot different. Not sure why.

gpt
I feel like on reddit you're a lot less likely to randomly end up in a weird subreddit and/or weird images - you need to know where to look (or go browse like page 100+ of r/all). The stuff on the front page is generally pretty normal and roughly what you'd expect, surprises are rare. 
  
 On tumblr it's more likely to *tumble* into some weird stuff in between your normal look-at-this-cute-doggo-gifs, so the whole experience is just more random.