Actually, just the opposite. They've been saying that they're carrying the ACC and that they're worth so much more if they left. That apparently isn't true or the TV people would have been drooling to get them in. There is probably still some truth in that but the offer price dropped pretty significantly with this one.
Or the TV People understand that an SEC team brings in the “SEC! SEC! SEC!” fanbase, while Pitt fans openly brag on this board about boycotting the national championship for the 8th straight year.