Same as other sports; kids have to buy in.
The big change recently has been the addition of Steve Magness on the distance side and, of course, Carl Lewis on the sprinter side.
It wasn’t so much Lewis himself, even though he’s a huge selling point, it was his Perfect Method program as well. Perfect Method basically gets these kids onto a professional team immediately after graduating college instead of having to try and find one. Add to that, Lewis’s extensive AAU network and the sprint side is one of the best and only getting better.