Some schools might offer better earning opportunities...

But realistically, how many college players have national marketing appeal... or even significant regional appeal?

Consider the last 10 Heisman winners - DeVonta Smith, Joe Burrow, Kyler Murray, Baker Mayfield, Lamar Jackson, Derrick Henry, Marcus Mariotta, Jameis Winston, Johnny Manziel, Robert Griffin III. How many of those guys had significant marketing appeal in college? How many of those who have been good in the NFL are making a lot of money endorsing products? Shoe deals, yes; but I have yet to see a Derrick Henry commercial even though he's one of the best two or three RBs in football.

It's more likely that the marketing dollars will be local. For example, the ND offensive line might pose for a poster and make an appearance at a local retailer or auto dealer to autograph the poster. The star QB might do the same, just by himself (i.e. no need to share the appearance fee).

If there is any benefit, it will be at schools located in big cities or not too far from big cities because the local opportunities are more plentiful; and even then, they college athletes will have to compete with professional athletes for appearance and marketing dollars in most of those cities.