Peakd, hive.blog, and ecency are catch all interfaces, yes.
I think of those tools as airports or downtown city centre.
PoB isn’t just a community.
There’s communities that are straight up communities, and there are a few communities that are also frontends.
They are their own town just outside of the big city- still connected but has its own ambiance and social behaviour. :)
RE: Why I Need to Stop Using Peakd and Focus on Proof of Brain