I have to think there's a pretty big incentive for both team and player to sign at or around slot. For the team it would be a PR black eye to not get the guy signed. For the player, holding out has very little upside and a boatload of risk. You're giving up 3 years of earnings, risking the chance you'll get drafted that high in 3 years, and the best case scenario is that you're drafted #1 or #2 and the value is that much greater in 3 years. But from 2013(Mark Appel, HOU, $6.35 Mill) to 2016(Mickey Moniak, PHI, $6.1 Mill) the #1 pick actually went down a little bit.