Iowa football uses a similar tactic
http://www.thegazette.com/subject/s...ommitted-to-us-were-committed-to-you-20160808
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In the past, Iowa has pulled a few scholarship offers from players (probably less than a handful) who surprised it with visits to other schools. It’s a sticky situation and everything is on a case-by-case basis, but the Iowa staff seems to have drawn a clear line."
Iowa sends a letter to athletes who commit..
"What’s No. 1 on the list?
“You must not visit another institution.” The next paragraph begins, “At this time, you should contact any other schools recruiting you to notify them of your decision to become a HAWKEYE.”
That begs the question, is that as serious as it sounds? Iowa recruiting coordinator Kelvin Bell says most definitely yes. The question was posed to him, how hard can you stay to that?
“Extremely ... extremely ...,” said Bell, a former Iowa D-lineman who also assists on the defensive line. “Once you’ve committed to us, we’re committed to you. We’re not going to go out looking at other kids at your position, so we don’t expect you to go out and look at other schools.” "