The OP asked if it is worth the money. If a cost.benefit.analysis is needed to answer that question, then they should wait until the first MH is held to see exactly what benefits the attendees actually received.
OTOH, if they're looking for the chance to participate in the one.time.only.first.ever Member Homecoming, with whatever perks, souvenirs, extra.park.hours, meals, parades, mementos, etc. - and warm, fuzzy, pixie.dust feelings - that come with it, then they should go for it.
For if you took every cubic inch of every acre of Walt Disney World and crushed it up until it was dust, you could sift though it until your children were grandparents, yet you'd never find the fun, the dreams and, yes, the magic that some of us see in Disney.