Maybe hoping to make their money back when people let their subscriptions idle during the off season for movies...but this is most attractive avid movie goers so I don't see this working. People who don't go to movies all the time likely won't get it.
The problem with this idea is that (at $9.95) someone in my area needs to see one movie in the evening and they're ahead. Two movies, and MoviePass needs them to not see a movie for a full month to almost catchup, and they'd still be behind by $1.50. During the big movie seasons, it's easy to see 2-5 movies in a month. I've only seen 2 movies (since April) that I wouldn't have seen without MoviePass. I've seen 15 movies.
MoviePass has paid $137.00 for me, and I've paid them $89.95 (I bought the annual pass, joke's on me now, but I did get enough in to be better than break even). If I'd done the monthly I'd have spent $38.80 over that same time, they'd be out $100. They'd need me to idle for 10 months to catch up.
Perhaps I worded that poorly. I saw 13 movies I would've seen regardless, and 2 I wouldn't have seen. So I did break even (a bit better than, actually).
I, personally, enjoy going ot the theater, I always have. And in past years have seen at least this many movies (though with an emphasis on catching matinees and discounted options, like two-dollar Tuesday or whatever). Two movies (average) per month is not uncommon going back about 6 years for me, with some years being lower than others depending on the releases.