You cannot receive any prize money or prizes at all if you want to continue in the USBC youth program.
Why would a youth turn to adult leagues with prize money instead of sticking with the youth? I think that's your base question. Sorry but your post was not very easy to understand.
One reason might be that as a youth bowler he didn't really accumulate too much scholarship money. Second reason might be that he decided that he wasn't going to secondary school aka college, so the scholarship money was not needed. Or thirdly, he has other avenues to get him through college so doesn't need to take up the scholarship funds from those that really want them.
But one thing is clear. If you are a youth and you bowl for any prize money you cannot go back to youth/YABA bowling. Its a one way ticket.
Erin