Which schools on the list do you think have significant self selection in application? The admit rate is simply the percentage of applicants who are admitted, but some lists of the most selective colleges and universities also factor in other criteria. On the MSN list Berea College is cited as the most selective for admission, but currently a tiny college named Alice Lloyd College has a lower admit rate.
http://www.businessinsider.com/thes...selective-than-some-ivy-league-schools-2015-3
There are several higher learning institutes that have long provided free or substantially reduced tuition to anyone in need of it, but are relatively obscure, such as ALC, the College of the Ozarks, and Cooper Union. It's only been since 2013 that Cooper Union, due to financial issues, no longer gave full rides to each student.
Stanford has historically been on of the most competitive colleges for admission, even prior to it having the generous financial policies that it does now. When it had the same income threshold for tuition waivers as Harvard it still had a lower admit rate.
Now that anyone whose parents are earning less than $125,000 a year annually can have their tuition fees waived, the demand will likely increase, but the supply of available spots will remain the same, if not lower. The yield rate has reached new historic highs each year, while the admit rate has plunged to new historic lows.