I used to use a version of that in D1 recruiting: promise a ton of minutes and a start in order to get a recruit to only consider me. Once he was only considering me, I would inform of a redshirt; inform of a non-redshirt, and do a couple home visits all in the same cycle. Once you inform of a redshirt it wipes out all promises. But once you do it, even after you pull it back, it costs you. I always just figured it was around a grand. I don't know how affective the strategy was. I used it a couple of times and I'm not sure it gave me more of an advantage than just spending another grand on the guy instead of the promises. I never really found a $ equivalent for promising a start and max minutes, and if it was more than a $1000 value. It still works, by the way. But an inform of a redshirt does not wipe out promises once the recruit is signed. I recently did an experiment with that.