Is it supported by either or both of Fate's licenses to include passages of significant length from the Fate Core and Fate System Toolkit rulebooks in a Powered By Fate game of your own design that you intend to sell for profit?
Specific case relates to the use of skills: if you would like to publish a heavily modified skill list, which contains skills that are unchanged from their Core incarnation, would it be within the rights granted by the licenses to reuse their descriptions from the original Evil Hat books?
My understanding is that OGL is viral (please correct me if I'm wrong) and therefore I would have to use CC-BY license to publish for profit. Please refer to that license when answering.