Big Brother goes Dahl-ish

Let me see if I understand how this works:

You buy a chocolate bar, find a golden ticket, and get a chance at the big prize?

I have a feeling I've seen this before somewhere. In a book maybe, or, that's right in a film - that nice Johnny Depp man gives away a factory in a competition something like this.

I foretell that the first ticket will be found, by a German. Their name will be reminiscent of a month, June, Julie or something like that - and they will like chocolate.

Are you that soldier?