I happen to have had good experience with Spirit Incentives product. If you have a valid certificate from Spirit that you intend to throw away, why not donate it to me. I can put these ceritificate to good use with local charities by booking trips for the local senior community. They have a lot of time but no money, and would be happy to be given a trip any date any time as long as there's someone who can help them with all the paper work and jump all the hoops.
Why waste it than putting it to a good use. You can contact me at firstname.lastname@example.org