I'm for sure not an expert on it, but I redeemed my miles to cover my annual fee last October and got one cent per point for it. As far as I know it wasn't a special promotion, but here's a screenshot of my redemption. It's the one for $89. It also let the redemption be for less than $100.
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I'm trying to redeem all of my miles on both of our accounts to close them when the next annual fee posts. I just feel like I'm always have problems trying to get the redemptions to work out. For example now, in my account I have 13,809 points which would be worth $138.09. I have two charges the points can be used for and both are over $300. Well, I can only use in increments of $25.00, so my options are to use $100 or $125 worth of points which would leave $13.09 that I can't redeem. That just bugs me, but I guess it is what it is. My only option as I understand it would be to charge something that I could erase in full and then it would let me use an odd number of points. Not sure how I'd ever luck out to charge a travel related expense for $138.09