I get the impression that good host families are getting harder and harder to find/replace. Heard the Hamptons league had some teams dissolve as all the homes were becoming second home vacation houses and some of the older hosts were moving on (cashing out). I think the team owners ending up stuffing as many players as they could in their own homes. Looks like some of the newer leagues have a completely different housing model (motels to go along with pay to play).
I do think the social media discussed earlier has something to do with it - seeing everyone else's summer fun when you perhaps get shipped off to some rural outpost (although some of the locations do seem more like vacation spots). I think social media has now been around long enough that 95% of these kids are very active users and some find it hard to embellish Kokomo Indiana nightlife.