BorisTheSpider:
"I suspect they didn't intend to include this pack in the promotion"
Come on - of course they know its included.
Its only 65g per bag. A snickers is 58g so in reality the buttons were ridiculously overpriced to start with, making this not such an amazing deal, but more normal chocolate value.
I don't know how you can compare these 2.
If you know of a better deal on Cadbury's chocolate Buttons then lets hear it. (Had a surreal feeling when I typed this)
I don't know what they sell at cinemas, but this is not the teeny bag which goes for around 30p, it's the next size up.