if you are a content creator who was banned from these sites it wouldn't hurt to join. Better to stand your ground than to secede ground.

If the lawsuits amount to nothing [which they likely will], all you're doing is adding your personal details to a list of "dissenters". If [when] they start taking revenge against said "dissenters" like they did with the "capital insurrectionists", it definitely would hurt you to join.

You could argue that you're already in a list somewhere if any of these websites has banned you, but that's still not nearly as "terrifying" to liberals as actually suing them.