The thought process is that there is this pool of HS players who are sitting on scholarships but are not quite worth a 3rd or 4th round pick. So you take them after round 10 and go over slot with them. Obviously the team has to carefully analyze the yield from this demographic. The Braves have not done much of this themselves (Vodnik and Drury being two notable exceptions) so they would need to look at the yield from other teams adopting this strategy.