PopcornPass.co.uk - O2 incentice

Anyone else have this and used it as seems a bit shit to me??

For renewing my contract I got an access code for popcornpass.co.uk which is a cinema ticket discount system with upto 40% off tickets.

I my area it only shows 1 cinema which is the one we use so all good but you buy a code via popcorn pass for the cinema and then put that into the cinema site (which I have not tried yet) when you pick the film you want to see.

I went on the popcorn site and added 2 tickets and it said I have got a total of ?2.12 off but the price it stated didn't match the price of the tickets on the cinema site which more expensive so looks like discount is more?

Also if I wanted to use for IMAX film do I have to pay the difference on the cinema site?