How does it work?

As it is, we do not like buying KFC because it is expensive. Now and then we fall into the trap though. I cannot remember when last I was actually satisfied with my experience at KFC. But today I am absolutely shocked. I bought my daughter a pops. Decided on the large because it seems to be the better option. To my surprise you need to pay extra for the spice. It comes free with the smaller sizes, but if you choose the Large you pay R3 extra. What absolute nonsense is that? When I asked why, the answer was that is how the system is set up? I don't understand, it feels to me like *****ing?