Today, all the mileage in my Midwest Miles account was zeroed out. No emails and not a word of explanation on the website. My account didn't even show any activity with the miles being subtracted. Just a starting and ending balance of 0. Over 4,400 miles disappeared completely. Way to go, Republic!
UPDATE: Never mind. The miles reappeared at 4:00 AM EDT. I must have logged in while the site was undergoing some kind of update. Still, why should the miles be zeroed out during an update?