They are slowly snowballing but it's accelerating. Once a certain amount of people leaves or stops interacting altogether, the site bleeds activity and dies. Roughly 2% of people who went on Reddit were responsible for some 90% of the content. 50% of people browsed without an account (you want those because they're the eyeballs ad are meant for) and the rest were lurkers who occasionally commented. That means if that even half of that 2% of content creators leave, there's no more content for the rest of the users to see or interact with. Once they leave, all lurkers leave. None of the lurkers are going to take up posting to Reddit, modding or create an account. They will just close the tab and move on to something else. That's the snowball that's coming.
(Numbers are roughly remembered from an old analysis of Reddit traffic, but they're consistent with almost all social media)
Responding solely to move from Reddit lurker to a Lemmy contributor.. this is literally the secret right here.. join the revolution, hit the effing reply button, y'all..
I did not know it was so low. That's crazy. It makes sense though. I don't know anyone who posts in real life. All the people I know who use Reddit are just lurkers.