I got my first 3-year diamond status a couple of years ago and just was extended to 2017. Hope I make it, since I have made a point of re-qualifying for Diamond every year even though I had the status without doing so. I also sometimes book and pay for multiple rooms but only get credit for one or two ...
(Erin, put in a good word for me???)
But no email... Then again, I never get email other than the confirmation emails.
Fingers crossed ...