Also, by these definitions would Amethyst be a super client and Primal be a client, where Primal, from what I can tell, only offers a social media feed component, where Amethyst has a marketplace, streams, etc.? 

Amethyst also has the ability to do groups. A lot of other clients/super clients do not. Is that a separate thing that would bump a client into super client status? 

 yep 

 I think these make sense to me. I like that the terminology is out there.