Assuming Fred & Co. think we still have a good chance with Vaughn and Cunningham, I doubt they'd accept a commitment from Macura. I imagine that's how his offer was presented.
Unless they value Macura similarly to Cunningham. It's possible they'd let one commit before pulling the other's offer in favor of Vaughn. I have a feeling they wouldn't offer unless they felt they could accept a commitment. That'd be an awkward conversation:
"We'd like to offer you a scholarship."
"Awesome! I accept your offer!"
"Oh uhhh yeah about that..."
Obviously only the coaches and the recruit know the actual situation, I just think offering a scholarship but not allowing a kid to commit could burn a bridge with a player a lot faster than telling him they want to see what their other targets do before offering. The former way could seem disingenuous to some recruits and rub them the wrong way. You very well could be right, though.