The thing about the anti-piracy is true, at least in the original version (I don't know about re-releases).

The way it worked was you had to offer at least a few pizzas that were reasonably close to recipes from the booklet in order to get any customers. Once you had that, you could get creative with custom recipes but if you only did custom recipes, you were bound to fail.

To be fair, I suspect real life is a bit like that too - there will be a big enough % of potential customers who want one of "the classics" for where you are (margherita etc in Italy, pepperoni etc in the UK, whatever) that basically every place that serves pizza will have the same first few options even if they get creative with the rest of the menu.