Seeing some solid data on this would be helpful

a little. died off years ago.

As popular as they used to be? Not really.

Are they still popular? Yeah, definitely. There will always be a consistent niche community of people who play private servers.

Not that i know of. tbh i just like playing by myself 

Depends on each person as it could be on PVP in the base game is not good enough or want to have all skills available for free, ect...

I would think that RSPS are still popular but not as popular that it once was.

I believe so

Yes

hmm

yes

if good