Worth noting: I came to enter the FD codes tonight, and MCR has awarded my Coke Zero/Kraft Foods bonus points ex post facto. I remember my points balance from yesterday, and it's 3 points higher today, so the bonus points are, in fact, being added, or at least they were in my case. Just took them some time is all.
And yes, the two 10096XXXXXXX FD codes are still working.
Oh, and thanks for the idea to use the sweepstakes entries on different things! I wasn't doing that recently, and now I've got some chances to win some other stuff. Thin chances, yes, but still chances which cost me nothing. Thanks again!