I don't think anyone truly believes the site is ending from our actions. It is more to trash the place on the way out. Reddit will make a clean sweep and everything will go back to their perception of normal, except a whole lot of active users will have left. It will sustain itself on bot reposts for a while, but in a couple of years the place will be boring and lack the humanity that made it great. People will wander off and end up where the humanity is, which might be the fediverse but maybe not. Everything is currently up in the air, but the shift has started. It's like how everyone used Facebook until they didn't. Sure, some people still use it, but a lot of people moved elsewhere.