Imagine going from a small community to growing large enough that Disney forces you to close up shop. This is exactly what happened with /r/MarvelStudiosSpoilers.

Here's an excerpt of what the subreddit's shared /u/MSSmods account had to say about the closure:

This subreddit started very small...I ran it alone, then I added some mods, then those mods left or lost their minds...It was along time ago (to me) and I actually do not remember all the details anymore. Eventually, I was able to get some reliable/responsible help for a page that was never meant to be a serious thing. It grew and grew...now it has grown so large that people from the MCU know of it. Sadly, this means Disney also knows of it. The Mouse always wins...a lesson I learned from South Park.

The group then said that anyone who'd like to take over the subreddit, including "all the legal ramifications" can message the shared account.

The said statement is no longer available now that the subreddit has become a "private community" and effectively shut its doors from everyone, potentially forever.