Vapor7: Bridge probably [hopefully] has more kids than 18 per tryout per age group per gender.
Please note that I am not criticizing Bridge for charging $30; as I said earlier it seems to me to be an appropriate amount for the level of evaluation needed at the challenge/premier level.
I'm sure it's probably confidential, but it would be fascinating to understand the financial model underlying Bridge, e.g., the fee split arrangement, if any, of member clubs and the field/facility "rental" structure. For non-municipal supported clubs, the key is typically primarily the capital debt structure; from what I've read of alliance-oriented clubs, the key is always the partnership structure.