If the B1G drops the FCS games, there is going to be a scramble to fill the slots. There are a lot of teams that don't like to play tough game early in the year. Teams like Syracuse, Troy State and others that are on the bottom end of Division one (competively speaking) could benefit from the scramble.
These games are big source of revenue for the FCS teams. They either have move up a division or make do with less. Troy State made the move a few years ago, they were a dominate team in FCS but not so much now. They made the move primarily to up their income per game.