We are building a commercial product that is using MySQL as the back-end. The product will not be open source (at least not initially).
We have had a very hard time getting any costing information from MySQL, they seem to want a percentage of the list price of the product, but no clarity is given on what that percentage is.
Has anyone sold a commercial product based on MySQL and successfully worked out a commercial arrangement with them? I'd be interested to hear your story and any numbers along with it.