I am sure there are many reasons. I think one huge one is that the wind is not always cooperative, making the planning/filming of events difficult, whereas - (even if not optimal) - many other sports (like wake-boarding) can pretty much charge ahead any day they want, within reason and if necessary. You can't do that with kiting.
In addition, placement of a viewing audience around a small lake is pretty optimal, or around many other types of X-sports.
Kiting isn't nearly as easy for placement of an audience, and obviously weather-dependence is a huge hindrance. This makes a traveling circuit really hard. This is pretty obvious, I know, Matt.
Same goes for surfing.
The ultimate X-sport (for viewing/filming, imo) is indoor freestyle Moto.
Weather is no problem, seating is already there. Just bring in the dirt!
You can start at precisely 7pm, Friday night. That's pretty convenient.
(Americans hate inconvenience and rain-checks)
http://www.youtube.com/watch?v=IP35r...eature=related