Not massively well-read on the #RedditBlackout situation and background, so take my ignorant bystander's view with a dose of salt. But my instinct from the Twitter experience is that almost all of those heavy #Reddit users currently insisting they'll leave aren't going to, however much they might want to and even if they might initially try to. Addiction is a hell of a thing.
On another note, those trying to treat this as some kind of official strike action and imposing the idea of a "picket line" that makes you a "scab" if you use the site are absolutely worth ignoring. A social media website isn't a workplace for its users, and as a user you owe nothing to any others.

@hughster Moderating a large subreddit is a lot of hard work.

Moderators are withdrawing their labour because of grievances relating to the terms and conditions under which they do their work.

People who use #Reddit benefit greatly from the work that moderators do. If you visit the site during the blackout, you actively undermine the efficacy of their protest.

It might not be a "strike" or "picket line" in the strict legal interpretation, but it's morally indistinguishable from one.

@krans Completely disagree, sorry. Moderators are not workers. All the work they do is entirely voluntary and is not "labour"; they are not dependent on doing it for their livelihoods.
@hughster @krans so red cross doctors also aren't workers then
Volunteer opportunities, rights and expenses

Find volunteering opportunities, and volunteer rights, pay, expenses, age limits, criminal record checks.

GOV.UK
@hughster @krans welcome to the United States, were they are classified as a type of worker

@tcgm @krans But I'm in the UK, and I'm speaking from a position of a user in the UK. There is a whole world beyond the USA.

The T&Cs we agree to make clear that:
—"moderating a subreddit is an unofficial, voluntary position"
—"you are not, and may not represent that you are, authorized to act on behalf of Reddit"
—"you may not perform moderation actions in return for any form of compensation"
https://www.redditinc.com/policies/user-agreement-september-12-2021

I'm not sure how much further away from "work" this could get!

User Agreement - September 12, 2021 - Reddit