Couple questions

Hey guys I tried searching through this subreddit before asking but I couldn’t really find a good way to look up what I’m specifically asking so I’m sorry if these have been asked before

1. What is the difference when they unadd you and it just says “snap” or “added” on their profile vs the x?
2. Some guy said he blocked me then also deleted his account. His name and best friend emoji is still accessible in our chats but when I go to his profile it says something went wrong please try again. Does it say this when you are blocked or when the account is deleted? Because I thought when you got blocked you couldn’t see them at all.
3. I am getting weird periods of time where I get mass quick added by mostly guys, I’m talking like 100+ a day, but only sometimes, is there a reason why? Sorry if these are stupid questions