Personally, I think it's quite unfair for them to federate all our posts and comments, and make their platform appear busy, while they don't allow federation of their own content, and they don't allow self-hosting either.
If we imagine what could happen in the future
- As they are on ProductHunt, they manage to raise a few millions, hire devs, develop every feature you can think about under the sun
- Fediverse users move massively to ClubsAll to enjoy the new features, Redditors move too because it's better than Reddit
- Over time, due to those new features and other "technical reasons",, federation with Lemmy and others becomes clunky, or completely stops
- Meta / Google / Reddit buys ClubsAll and start to look how to extract a profit from the large userbase, enshittifies the mobile app, the web interface, etc.
Seems to bring us back to the current Reddit situation with extra steps.