What happened June 21st? It's the first exponential growth and it's also when I made my account, but I don't remember what was the trigger to finally make an account.
Edit: I think it's when they started trying to force subreddits back open: https://www.reddit.com/r/ModCoord/comments/14ffsk8/reddit_is_a_bully/
I'm glad you could enlighten us with a post that doesn't bother to explain anything.