Well the only moral thing to do would be to give it to Symbonia seeing as how it's
his hard work
Taking his work away from him and giving it to someone else is just as bad as theft. Also, at the moment Serenity is the one renting Faldur's server, she's paying for it. However, Symbonia will pay for the next 6 months after her 6 are up. This I know to be true because I spoke to Symbonia about myself.