You end up with one community with 8000 user , second community 17.
Unless there a major fuckup, only the biggest community is viable and gets seen by anyone. It sucks the air out for everything else. Because nobody is going to manually subscribe to 50 microscopic /c/books communities on as many servers.
That recreates Reddit mod power problem and it will kill Lemmy in the same way.
Maybe Lemmy simply already isn’t viable, just a Reddit clone with meaningless federation feature that only decentralize unimportant stuff but not the strangleho lady that moderators have on communities.
The second community will never be viable because even if the first community messed up as bad as Reddit, we know less than 5% would even change their habits.
Lemmy is not spez proof, it empowers the spez as much as Reddit.