Yes I don't think its exclusionary at all! IMO, people deserve to be recognized for their contributions to PC, whether that be by donating money, or by being an active, long-standing member of the community.

That being said, I don't think it was meant to exclude anyone. If anything, like Sky said, it will [hopefully] encourage people to continue participating, and will help PC grow as a community. It's no more exclusionary then labels for how many posts you have?

Just my opinion...