Yeah. I got a little disappointed when I learned that people under 18 couldn't participate in the tournaments. I don't think letting them play is a bad idea. Perhaps you guys can try it.
Oh, and also, you know how WGT will award you with XP for playing consecutive days. Maybe you can do the same for credits. For example:
2 days earns you 10 credits.
3 days earns you 25 credits.
4 days earns you 50 credits.
5 days earns you 75 credits.
6 days earns you 100 credits.
Anyways, you probably get the picture. Maybe we can make one of my suggestions happen.