I am a CO Platinum going to lowly Silver next year. I would like to match somewhere, preferably Star Alliance. My travel next year will be back-end loaded so challenges will not work. I called USAir and they suggested I buy the trial preferred status. United seems to only be doing challenges. Am I out of options? It seems crazy that all three of the sky team airlines are still matching, but no one else does.... Thanks in advance for any suggestions.