I think we all accept that we aren't at the top of the automotive food chain with 34s, so to call it elitism is a bit of a stretch. Exclusive is right.
If someone wanted to do a lambo, commodore or sigma only event, that's their prerogative.
It's an "invite only" meet, and the invite is an 34 GTR. Bobby doesn't know everyone with a 34 GTR, hence the need to post the invitation on a public forum.