I have no idea what the current top 5 FCS schools are, much less the top 25. It's not going to make them known nationwide to play in a league that's on TV for maybe 2 games a year. So they'll be making less money from their TV deal.
If they still aren't getting any exposure, they aren't going to get any more applications from people watching them make some miraculous upset or run through the NCAA tournament. If they aren't getting any more applications, they aren't making any more $$$.
If they are in FCS, they're playing a bunch of other schools nobody has ever heard of before (because they're never on TV). So they'll have to lower the ticket prices for games because the level of competition is down. They're again making less $$$$ even if the exact same amount of people show up to watch the games.
Let's say a school is averaging 20k in attendance for their years in Div 1. When they make the switch, I actually think there will be an initial DECREASE in season ticket sales, as well as individual game day sales because the school is now playing a bunch of teams nobody's ever heard of before. People that were just football fans, and wanted to see the Boise State's on the schedule come so they could see guys that might get drafted high play are no longer interested in going to the games. So they'd better start winning QUICK in order to have this massive jolt in attendance that must happen in order for them to make more $$$. And that massive jolt will have to be well above they're original number in order to make up for lost $$$ in lower ticket values as well as lower TV revenues.
Also, is the plan to get strong and then move back to Div 1?
Mtn Buff, I need another post giving me CSU's optimal plan of action!!! Lol