It's terminology I would use, and it would totally be an expression of how much I enjoyed the story and wished there was more to read about it, because it did get me thinking, etc... I"m sure the person is not wanting to force you to write more, but they see alot of potential in the story and just want it continued. You gave them a cookie, and it was sooo good they want another one. Their expression of wanting more is their way of showing how awsome the first taste was. They'll take the scones, but always have that haunting taste in their mouth of the awsome cookie. (shrugs) It happens. They can try an recreate the awsome cookie they once had, but in regards to Fanfiction that would be a high level of rudeness.