a) the SEC is already in SC and Fla, adding teams from those states doesn't increase the pie
It actually decreases the pie by splitting the market without adding a new one.
Using the closest market, city-wise to the school in question answer this: which major market will adding that school deliver that the other currently existing school in the same state won't?
Can't use Alabama, Mississippi, or Tennessee as example states, as those states' members of the SEC are original members.
Georgia: Georgia Tech has steadily lost ground to UGA. In fact, it's probably safe to say that Georgia Tech can't even pull the Atlanta market, its own host city. Why would the SEC add a school that doesn't add any nearby market, LEFT THE CONFERENCE ALREADY, and adds another mouth to feed?
Florida: The only major city closer to Tallahassee than Gainsville is ATLANTA. As the Seminoles don't carry the majority of the market in their own home state, what makes you think they'd carry a greater share of the ATLANTA market than UGA?
South Carolina: The closest market to Clemson is Charlotte, NC. Unless you can guarantee that they would pull a bigger share in Charlotte and the Triangle (Fayetteville, Raleigh, Durham) than either the North Carolina schools OR South Carolina they are another mouth to feed without the benefits. Put a NORTH CAROLINA school in the SEC, on the other hand, and you extend the market into Virginia and possibly even DC.
Texas: All the talk about Texas being a "great addition" to the SEC discounts one HUGE fact - Which city in the state of Texas had the largest increase in market share for the SEC when A&M joined for this past season? Austin
. What NEW markets will Texas provide that A&M hasn't already? A&M already brings Dallas, Houston, San Antonio, and Austin
(yes, Austin had the largest increase in market share for the SEC since A&M joined)
Kentucky: UK already provides most of the state and even dips into the Cincinnati market. Louisville wouldn't all of a sudden wrest control of the state of Ohio from OSU.