What's the deal with Everleaf and is it possible to switch skins?

Back in April, when I was scrounging for a poker fix, I pulled up an old offer for $7 free from PlayPoker77.
I'd been playing PS and FTP exclusively and didn't have a clue about skins and networks.

Apparently, PlayPoker77 is also on the Everleaf network.
I'd like to use the FTR link for Luvin Poker but is it truly impossible to join another Everleaf skin?
I'd even cash out and void my PlayPoker77 account!