Cinema booking fees

I just don’t get why some cinemas are charging “booking fee” when buying tickets online.

I can understand if this was many years back when cinemas only allowed customers to reserve tickets. A booking fee would deter “no shows”.

But when one is already paying for the ticket, why still charge “booking fee”? And the reply I got from GSC was:

I don’t buy it. It should already be cost of doing business online. And going online is the way forward. Already cinema operators save on costs like not having to print tickets. And they don’t need a bigger space for people to queue up. So, yes, I’m quite puzzled and disappointed that online users are being charged for this.

On a related note, I was told that MBO Cinemas do not charge this. I guess it’s time I start to use MBO Cinemas instead.