OK. My account closed in the early am, and the 50K showed up in my UA account within the last hour. To recap, I have had the CO Mastercard for 15 months now, canceled my UA Visa in June 2011 after 1 year, applied for the UA Explorer mid-December 2011 with instant approval and got my CHASE EXPLORER ENROLLMENT BONUS 50,000 today with a $10 purchase. I think we're all safe on this one.