I'm guessing that if Outing wanted to be a Cyclone he could have..... weeks ago. I think ISU was going to take either Ayeni or Outing, whichever committed first, and then the other one would lose out.
When you get down to this late in the ballgame, the advantage sometimes turns in favor of the school over the recruit. You only have a few spots left to hand out, so you tell a possible recruit.... "Hey, we want one more DE in this class and that's all we have room for. We definitely would like you to come on board, but we can't wait forever. So basically, we are going to take the first DE left on our board that commits to us, and then we're closing our recruiting for the year at your position. So if you want to be a Cyclone, you better not wait too long."