Advertisers are starting to take notice, it seems. Gotta keep the blackout running longer to hit em in their pocketbooks - 2 days they can weather out, indefinite dark they cannot. It's what I've been saying from the beginning, a protest with a clearly defined end date has no teeth.
I've heard about Reddit removing a mod from a popular subreddit, then turning the subreddit public (sorry, don't have the reference). They can always stop the blackout by force. But once they do that, those mods will have definite incentive to start the communities in the fediverse.
That seemed to be a situation where the head mod was going against the wishes of the other mods. Not sure how I feel about it, personally, but it's not quite as simple as "Spez made the subreddit open against the wishes of everyone involved".
It was done because the head mod (who barely contributed anything) showed up out of the blue and decided to enroll the sub into the protest. The rest of the mod team was not in agreement with it.