From a personal perspective...

While my son has not been developed exclusively by CESA, they have developed him into a player further than where he was when he started playing for CESA.

I have before, and will continue to commend all those that had a hand in his development, from the volunteer coaches at U10 and below with AYSO, to his current coach. Along the way he has been "developed" by the likes of ODP coaches, Finotti, Pinasco, Rose, Bouleware, and currently Alsop. Club coaches, Brisson, Lundy, Birchwood, Crosby, Eudy and currently Finotti. HS coaches Helms and currently Birchwood. Numerous camps and other coaches along the way. Each one plays their role in "development".

Does this mean CESA owns the rights to his development, no. But what it does mean to me, they have played a role continued and furthered his development.