Ann: MOU with Amer-NTL.NZ, page-42

Forgive me for my ignorance, but can anyone explain what they mean by 'a guaranteed cash profit'. I assume it means that Amer will pay NTL if NTL does achieve a certain level of profit, but I've never heard of an arrangement like this before (though to be fair I'm new to investing in miners).

If so, this sounds like a great deal. Of course the devil's in the details (price, level of profit that is guaranteed) but given how uncertain early cash flows for miners are, i would have thought the profit guarantee must be worth quite a lot.