Grey's Law? Because Snidely Whiplash at Microsoft really and fundamentally cares about what the FSF is going to say to people, right? They care so deeply that they're going to unleash a bwa-ha-ha eeeeeevil campaign to call the FSF's site a gambling site?
Or, shock of shocks, maybe one person, working for the third-party that sold Microsoft that particular "dodgy domains" list, clicked the wrong checkbox on that one domain (of many hojillions checked per week).