I think there actually are a lot of people playing and who know the game based on the feeds. Alyssa/Paloma are both playing together and working on developing a larger group.
Kyle/Pooch have a connection. Daniel and Nicole have already made a final 2. Both of them are big time fans of the show. Daniel mentioned last night it's so hard to act like he doesn't know who previous players are when he's talking.
Ameerah apparently is a super fan. Either Alyssa or Indy were talking about being fans of BB Brazil and how many viewers it gets over there vs the US version.
Michael the genius cat lawyer is absolutely a super fan. Not sure how much Jasmine is though she has said she used to watch it with her dad I think and he passed away, etc.
Matt Turner also knows the game really well and was 'explaining' to Daniel around the psychology of who to nominate in week 1 and how it usually plays out if they're a stronger threat vs weaker, etc.
No idea on how much about the game Pooch knows but he's definitely playing it. Taylor, Monte, Terrance, Joseph and Indy I'm not fully certain.
It's obviously very very early but i was a little more impressed by early game talk than I thought I'd be when i was watching yesterday/reading updates.