Many subs are already opening up again sadly.

The subs going dark should have only been half of the protest. Users should have also stayed away from the site but I don't think that was really coordinated.

The number of new posts didn't drop much, the comments dropped a bit more but only by like 20%, which isn't a lot given the amount of subs that went dark. Reddit doesn't care about subs, they care about users and it seems engagement was still pretty high.

The next protest should be to all users to stop using the site. Drop the users and they'll start to listen.

Before asking people to leave, subs creator should create similar communities on Lemmy
I'm pretty sure none of them thought about that because they're basically just doing this out of anger. They know it won't change reddits decision so they want to take it away from all the users that don't really care about third party apps or mod tools.