one thing to remember is Elites tend to be for the most part extremely loyal to their home carrier, meaning CO elites tend to fly CO more than any other carrier, NW elites tend to fly NW more than any other carrier and DL elites tend to fly DL more than any other carrier so it wouldn't be the end of the world if they did EUA across all 3......do a search and you'll see threads with a very similar theme as these when the CO & NW EUA program first was announced