Since United has taken the liberty to adopt Delta's Medallion Qualifying Miles revenue spending requirements for elite status, and United again copied Delta's RDM earning scheme which awards miles based on a ratio of miles per dollar spent. Delta needs to protect its intellectual property in the SkyMiles program. Delta should patent and trademark the SkyMiles loyalty program and its components. When it releases its 5 tiered award redemption scheme next year, United will have to rightfully pay Delta a royalty or fee for copying its program. Our ATL friends should be financially compensated for their loyalty program undertakings.