We'll be sending a curated email every week/month to the students (opt in), listing job openings that we think will be a good fit for them. Ideally, recruiters will want to be in a featured section at the top of this email.
Hopefully we'll have thousands or tens of thousands of recent high school graduates and college students who have proved their score. And that this exposure will be worth paying for.
As for why would people want this:
Many hiring managers will prefer to hire from top-notch schools. Acceptance to those schools is based in part on your SAT score. So colleges act as a very expensive proxy for SAT/Aptitude tests.
Interestingly enough, many companies ask for a student's self reported score in the hiring process, but cannot verify the score (until now).