It was a thing last... summer? Where reddit announced they were going to start charging for every call a third party program made using the API. This was done with the intent of shutting down 3rd party reddit apps and to get users on the official one so reddit could make more money. However, it also destroyed a bunch of 3rd party tools that mods more or less needed, and which reddit had been promising to implement themselves for years with no progress. There was a brief protest where mods of many subs shut them down (mostly for less than a week, though some are still down IIRC). A bunch of users and moderators left reddit and went to other sites.