The Reddit owners seem committed to their course, so I don't think it matters how long the blackout is on that front, but a 1-2 day blackout will bring the issue to the attention to more users, prompting more of them to move to other communities and giving those communities enough traffic to be active.
Reddit is doomed. Nothing will change that at this point. The focus needs to be on building the communities that will replace it.
I've seen several going indefinite, a few going a week or so, and the vast majority only committing to 48 hours. Even then, though, many of those are open to extending it.
The problem will be that, at least for the major subs, Reddit may just kick the current mods off and install others who will not continue the protest. It'll be interesting to see what happens tomorrow.
Well, maybe. Maybe fucked for the time being. But part of me thinks the cat is now out of the bag. If Reddit doesn’t end up shitting on everyone now, surely they will at some point later down the line.
I don't think that will happen. Eventually, it will trun more into a microblogging platform, like FB or Twitter and this wil cater to the needs of your average Joe. It will lose some of it's userbase, but most communities will stay on it.