They well might be, realistically. Other similarly-atrocious sites that were eventually shut down by Cloudflare had a lot of trouble finding new hosts.
In addition, the dark web would result in them losing a large portion of their user base, both at the initial switch over, but also over time as existing members leave.
Decentralized =/= dark web. Who's going to stop them from setting up a Mastodon instance, or making an invite-only Matrix server?