It is an anecdotal response to your first point, but since you didn't place a threshold I'll say it anyway.

I have two friends who I'd describe as average theatre goers. Maybe a movie every 2 - 3 months. Since using MoviePass they both average about two movies a month during 2018. I am not sure how sustained that behavior will be, but at atleast in this early stage it is lasting.

As for the second point, he is arguing they never sell the ticket once. AMC does not get the money if the subscriber does not attend the film. So by fighting with MoviePass (as they have been), they never sell the ticket once.