I believe the D3 schools on the list are NLI member schools because one or more of their sports are D1. For example. Hopkins is D1 in lax.
http://www.hopkinssports.com/sports/jays-unlimited/spec-rel/endowed-scholarships.html
Clarkson, RPI, St Lawrence for hockey, I expect.
Correct that no athletic scholarships at D3 schools for D3 sports.