It's all about money. Money from the ticket sales and money from a better bowl (if/when they win).
Its all about
making it to a bowl game. They've pretty much said as much. There's not a lot of faith in Columbia they'll win against Florida and Clemson, a cloud of doubt on whether they can beat Ole Miss, and they're seeing a season possibly end with five wins
unless they added the make-up game. A win against Akron will get them to that six win mark.
BTW, every conference game left on UofSC's schedule is on the road.