The deal that SandNerd mentioned last month is now back and a little better.
Sinemia - If you pay annually is $9.49/month for 2 movies a month. Looks like both movies can be IMAX with the new terms.
There is even a plan for 2 for $18.49. In this plan you can take whoever you want for the second ticket (both tickets need to be used together).
More movie theaters also seem to be included than moviepass.