Previously the Max Pass was a joint between Intrawest, Powdr, and Boyne, but this year Mountain Creek has joined. MC is a former Intrawest property that is now owned and operated independently.
This is a great thing for the NY Metro area, because previously there was nothing within day trip reach that was on the max pass. One could buy a Mountain Creek pass, and then get the max pass add-on, allowing them to make trips to Killington and Stratton. That's basically 2 weekend road trips to each. You could also ski out west 5 days at any of the places on it for free.
Mountain Creek was connected with Stratton under Intrawest, and has been working with Killington since leaving Intrawest. Now they're connected with both, plus Tremblant, Sugarloaf, Sunday River, and a bunch of great mountain out west.
This should definitely increase max pass sales as the NY Metro Area now has a local mountain (albeit a small one) that's on it.
I've lived in New York my entire life.