The CO delegates were originally slated to all go for Jeb Bush. There wasnt chance in the world that they were going anywhere else.
No one planned for Jeb to be sidelined, but Trump did it anyway.
So Jeb dropped out.
Since he has suspended his campaign, they needed an insider to be a place holder for the delegates and that turns out to be Cruz, who will control those delegates until the Convention, then, after a few slight of hand tricks, they are slated to go back to Jeb, or maybe Mitt.
Cruz will never get to enjoy the delegates at the convention.