Not to mention, if you really did have a mailing list that was effectively worth $175m, why would you give the whole thing to anybody before you get paid?
Even if you don't get responses & interviews, you can also use the profiles to do verification - just find correlated data in the wild showing that these people exist -or don't. Check the physical addresses - is the same family name resident? Check school records, does the student exist? Etc. Etc. Etc. Sure, you'll find a few failures, but when they all turn uo bad, you will have saved your team $175 million - worth a weeks effort.