Risking the loss of a little bit of money is just the cost of doing business. Sure, bag schools would be a little angry at the kid who gets his beak wet and still goes to another school, but for every one of those rare birds they get plenty who get sucked in wanting more. Kid takes his McDonalds bag with 3 grand and goes elsewhere? Every bag school is throwing a few thousand at the top recruits. It's pennies for those multimillionaire boosters. However, if a kid takes 250 large and then still goes to another school, they aren't going to let that slide. It's not just the cash, it's the new jobs for parents, cars, etc that come as part and parcel of the deal. There are all sorts of ways to put pressure on kids and make their lives miserable and lots of ways to play dirty. Think of all the attorneys who are UF law grads and boosters. Kid lives in an apartment complex? Building owner gets threatened with a big lawsuit over some frivolous matter unless he has a conversation with some particular renters about returning the money. Or maybe the UF boosters make sure their good friends on the local school board investigate and fire the kid's HC. Remember, these dirty head coaches are also getting their salary supplemented for pushing recruits to certain schools and ensuring they stick to their commitments- they want that gravy train to keep running (say Marshall got 250k, his HC/handler might have received 10% of that amount as a handling fee). If the kid takes a couple hundred grand and then backs out of his commitment, every bag school will know they can't trust his handler/coach and he won't be getting any more financial incentives. The coaches aren't going to let a single recruit ruin it for them and they will do everything in their power to make sure the kid sticks.
Anyways, the bag schools wouldn't drop that kind of money unless they had some assurances that it's a done deal. As some of the folks on this board with insider knowledge (I'm not one of them) said at the time, at the last minute UF offered Marshall so much that it made Bama do a double-take and say, "Holy **** that's a lot of money."