I think that's the difference: Pirate Bay and Silkroad knew they were inherently anti-establishment, but it seems to me that Parler and Gab think of themselves as "alternative establishment" or something.
Pirate Bay was never trying to compete with Netflix or Steam-- it's conceptually very different. But Parler very much wants (wanted?) to just be Twitter but with right-wing politics.
I would advice against hosting servers in Russia, though. Police raids on datacenters, where they literally rip servers out from the racks, are, unfortunately, a common occurence.