Just off the top of my head, I'm thinking:
- They're probably expecting the GM and/or other players to respond with either "sorry, that schedule won't work for us" or "yeah, that works for us, tell us about yourself." Like, why type up a three-paragraph introduction when there's like a 50% (or more) chance that bit of information will quickly indicate that no, it won't work out.
- Are you sure they didn't just assume the chatroom owner was the GM?
- So far I think they're just trying to gauge whether it's going to work out logistically.
- Again, are you sure they haven't just mistaken the channel owner for the person is most responsible for organizing?
I guess just going on that information, it does feel to me like maybe you're reading too much into it. It's entirely possible I'm missing something that would change my take, though.