MLS clubs are certainly committed to non-MLS clubs but the non-MLS clubs' entrance into the MLS Youth League will most certainly be invitation-only and just enough clubs needed to effectively run this league on a regional basis and still have competitive parity. Both the LA and San Diego divisions of DA League had far too many clubs. Half of the clubs or maybe even a little less is my guess. Would be interesting to see the analysis on which non-MLS clubs stayed in competitive reach of the top clubs in the DA league.
Both the articles posting and the one on the MLS site say they're welcoming ALL former ussda clubs.
Besides those could see a invite or application requirement like most leagues. Going to cost and MLS hasn't been doing anything but cutting those so will be interested to see what they come up, the financing to start something up new given the current situation