German here. I have never not had popcorn when going to the movies in my younger days. It is just part of the experience.

But in my days it was around 12€ for a ticket, popcorn and a coke. And there were cinema days with special deals. Or cheap sneak previews.

I would never go when paying for me and my SO is equivalent of one of my subscriptions for a year.

I don't think that math checks out as the subscriptions got way more expensive as well.