Yeah, no. It doesn't work like that. You're basically saying that Silver Dollar City have produced that ride type for other parks to use out of their own money. That doesn't work like that. In reality - parks put tenders out to different manufacturers to ensure they're getting the most for their money, in terms of both track length/size, marketing potential etc., the manufacturers then decide to pitch their hardware and designs to the parks. If a manufacturer doesn't produce that type of coaster or hardware, they won't even tender for it. B&M wouldn't pitch for a spinning coaster and Zierer wouldn't pitch for a Giga Coaster. The cost of the R&D behind each coaster type if not taken on a project basis - the manufacturers use their bank balance from all projects to further develop their existing portfolio of products - not charging parks to do it. The difference is... if a park specifically request an amendment or product from a manufacturer, they may in fact concur additional charges from that. The Xtreme Spinner product has evidently been a coaster type that's under development as there's already other layouts available to purchase off the shelf, so SDC would absolutely not have forked that out. I'd suggest doing a bit of research before pointing out 'facts'.