Commercial use, like I said in the Vampyr forums, is gaining economical wealth with a product whether it be buying the entire game, or buying items from a game (For instance : Nexon's Maplestory is a commercial game because you can buy items to further your gaming experience), and since this is a product based off Vlad's Vampyr Net Gaming system which is licensed under Creative Commons to NOT be used for commercial use, you can't gain money using it at all, whether it be through an item shop or not.