I was Aaron Liu, user572982 on this site, and all my accounts got mysteriously deleted May 1st, 2020 at 10 AM UTC under mysterious circumstances.
I have just asked a question on this very site, and was editing a question on superuser.se until a message appeared stating an error occured. I had an account on Retrocomputing (with pretty high rep), an account on Puzzling, an account on Stack Overflow (forgot questions but I know it's user5153901), etc. I reloaded the page and found out that I wasn't logged in!
I tried every other site that I had an account, and none worked! How do I restore it? If I can't, why was I deleted from the entire network?
This very question was delayed by some time due to "You can only post once every 40 minutes.", which means that I am still somehow linked to my deleted old account.