futbol(soccer): I don't know what "purged" meant in this -- although my guess is that you're right in your conjecture concerning the tightening of requirements and the law of unintended consequences.
Hurst66: More than 300 kids lost in the midstate district, so with 5 teams that's 60 per team -- you guys carry deep benches!
Both the coastal district and the midstate district saw losses in the hundreds. I personally think the root cause is probably a combination of stricter coaching requirements and a lack of active recruiting in the younger age groups -- combined with growth in non-SCYSA leagues. But that's just an opinion; I have no facts with which to back that up.
I know I harp on it a lot -- but I see absolutely no evidence of any concern, let alone well-conceived and designed programs, to increase the number of kids playing soccer by the SCYSA. But I've been beating that dead horse now for several years...
Steve: I wish I could get the registration numbers for YMCA, AYSO, USCS, etc. -- but I don't know how. I think your theory is a good one.
I believe that for everything except premier and challenge, that opportunities are rife for ***ANY*** organization to come in and offer alternatives to the SCYSA -- and/or for the SCYSA to change its policies and work hard to attract more kids into its affiliated programs.