I also do not personally believe in yet another slicing of the communities into different platforms, and if Sublinks aren’t integrated into Lemmy - requiring new communities or separate accounts - I will not be following along. Of course, somebody else could always take over my communities in that event, but I just wanted to let out my opinion on this.
Sublinks would work th same way as Mbin does. People on Mbin can currently interact with all the Lemmy content in a similar way Lemmy users do.
The reason this effort didn’t work and most of these communities reverted back was the extreme fragmentation and confusing nature of the early Fediverse.
To be fair, when the migration happened, Lemmy wasn’t ready. Federation was still flimsy, and LW was under constant DDoS attack. Lemmy is in a much better state now.