Of course IMAX is on board with AMC's plan. IMAX was one party that was credibly threatened by MoviePass, since MP customers were prevented from purchasing IMAX tickets. MP customers will see Mission Impossible tonight in normal 2D for free, reducing the demand for IMAX.

AMC completely flips the script. Its members can see IMAX films without any premium cost, even on opening weekend. Regular screen, or 3D IMAX for the same cost (both for free)? Of course, let's go see IMAX.

The problem for AMC is that it is now on the hook for paying the IMAX premium. Your article says, vaguely: "the theater chain will ensure there is no reduction in Imax’s overall economics." So it's a no-lose proposition for IMAX but AMC now has to cover the cost of tickets sold to A-Listers.

Here is a link to Regal theaters showing Mission Impossible tonight: https://www.regmovies.com/movies/mission-impossible-fallout/... Notice how nearly every showing says "No Passes"? That's because giving away a free seat to a sold-out show reduces ticket revenue. That's been basic policy at movie theaters for decades. AMC has decided to toss that model out the window.

The best I can infer, is that simplistically the deal will be if they expected to make $X from IMAX based on Y people showing up before the subscription, as long as they make at least $X or slightly more than $X, IMAX will be happy with the decreased cost per ticket.