Nah, they’d still have to be able to predict where else the applicant would or would not be accepted, comb through their past posts to make sure the applicant’s ranking of schools hadn’t changed, and spend a whole lot of time confirming they have the right applicant from among the thousands or tens of thousands of applications they receive. It would be much more worth their time to spend those resources on outreach and marketing. Besides, most of the “Chance Me” posts are for Ivy League schools, for which this kind of data mining would be least useful.