From the new user faq: What about downloadable content, in-app purchases, microtransactions, virtual currency redemption, and subscription fees, as well as in-

From the new user faq: What about downloadable content, in-app purchases, microtransactions, virtual currency redemption, and subscription fees, as well as in-app advertising and affiliate program revenue? Revenue from these sources is included in the gross revenue calculation above. Are any revenue sources royalty-free? No royalties are due on the following: Ancillary products, including t-shirts, CDs, plushies, action figures and books. The exception is items with embedded data or information, such as QR codes, that affect the operation of the product. Consulting and work-for-hire services using the engine. This applies to architects using the engine to create visualizations as well as consultants receiving a development fee. Linear media, including movies, animated films and cartoons distributed as video. Cabinet-based arcade games and amusement park rides. Truly free games and apps (with no associated revenue).