Just based on potential eyeballs UNC, VA, and BC expand the viewership. Miami also brings in a major metro area. I understand the emotional aspect of Clemson and FSU wanting more money to maintain their brand. The reality is most of their TV viewership is based on the fickle bandwagon fans of a "national" brand. A few bad seasons and those eyeballs are on the next shining spinning thing. Clemson and FSU are both out of touch with their true market value.
The Big Ten brought in Maryland and Rutgers for only one reason, increased viewership coming from two of the nation's larger metro areas. It's not like they have been major sports powers (perhaps MD in basketball, but football brings in the $$$).