T4R. Is the free copy of Crysis linked to the account you buy Crysis 3 with, or can anybody use it?

I don't think it's transferable, it must be linked to your account like you mentioned and it makes sense if that's the deal.

Assuming it's a digital preorder, the bonuses are account-bound. If it's a physical copy, it might come with a little card with a Crysis key on it. In that case, you can give it away, like the Diablo 3 starter keys inside the Collector's edition.