My son has played on multiple Nike teams. He is not a Crab though there are plenty (which makes sense given the program). Pretty sure most if not all of the kids tried out but by the time you are a fresh/soph in HS the evaluators have a pretty good idea what your body of work is. If anything they struggle with trying to keep some county/city/public/private diversity and having too many players from an individual HS (very obvious with the helmets). No one is ever happy but the teams have done very well so it's not like they are picking crappy teams filled with personal favorites...