Rememer that MF doesn't send rejection notices -- if you can find the job posting again (and that's IF, not WHEN), you can see if they rejected it. In my experience, if they don't notify you quickly, i.e. within a few hours, that you've got the assignment, then you likely won't get it -- although others may have different experiences.
I put in three MAOs today. One was rejected quickly, which I saw when I went back to the job listing. For another, now I can't find the job listing, so I'm assuming it was assigned elsewhere (although it would be weird, because it's an unpopular job during an unpopular time period). For the third, I was scheduled for the assignment within an hour.