Same for me, and I actually wonder if they're sending out so many of these knowing that many people aren't in a position to use them. I have a HAL cruise booked for next year already (that isn't in the free options), and that's the only one I'll be able to do. So I take one look at the free stateroom emails and then delete them.
@syesmar, I've been getting these offers via email. All of them have had "Free Stateroom" somewhere in the subject line, so you may be able to search your email using that phrase.