So in summary, you are proposing to block most of the active membership here from interacting with SocialHub, as well as the entire fediverse. If they don’t all come here and agree to this policy, dictated by a handful of the people currently in control of mod policy on this longstanding community forum.
Again, not for doing anything to violate the spirit of the policy, or the letter. But simply because they haven’t complied with orders to complete a box-ticking exercise.
With all due respect, which aspect of this is not authoritarian? Not to mention counterproductive. If you are committed to this path, then I call on the SocialHub community to take up the offer by @JoinFediverseWiki for their organisation to take over stewardship of SocialHub, and move it to their infrastructure.