I know there are a variety of tire sizes for various needs, but it just seemed a little odd to me that someone would introduce a new line of $50 fixie tires in 28mm, instead of the far more common 23mm-25mm size.

I'm guessing that the 23-25mm tire size would be 80+% of the fixed gear market, and of that remaining 20%, only a small percentage would be willing to pay $49.95 for a tire (despite the attractive color choices), so it seems like a pretty limited customer pool, hence my question about how many people actually use the 28mm tires.