CryENGINE 3 Independent Developers Platform offers a royalty-only license model, that requires you to pay 20% of your revenues.
Their website says this about it:
CryENGINE® 3 Independent Developers Platform We want you to make games with CryENGINE® 3 that people will want to play. We hope that your work will lead to a product you can commercialise. If this is the case, before you can sell your work or your game, you must seek a development license for CryENGINE® 3. We’ll offer a royalty-only license model for Independent Developers, where Crytek require only 20% of the developer’s revenues from the commercial launch of their game.
My question is:
What technical mechanisms, if any, are in place for CryEngine to accurately track the downloads?
I'm wondering how they validate my sales numbers and confirm the 20% revenue.