I got a similar email... altho I have to earn 3750 miles in 90 days....
Are you a JetBlue customer who enjoys a certain, shall we say, status? Now until April 18, 2014, TrueBlue members can sign up for the Mosaic Challenge, where you can earn Mosaic membership fast – 90 days to be exact. Earn 3,750 base flight TrueBlue points during your Challenge period to qualify for Mosaic through December 31, 2015.*
Do you also belong to another airline loyalty program that—let’s be honest here—may not be living up to your high-flying standards? You’re in luck. For those members with specified status in certain programs —we’ll automatically give you Mosaic for the rest of 2014 when you’re enrolled in the Mosaic Challenge, and if you complete the Challenge, stay leveled up through 2015.*