I would add it is tough to know how many each school has because many do not put out a fall roster so unless you go look for yourself or talk to a player there is very little way to know. Coaches have different philosophies. Some say I'm gonna give as many kids as want a chance to earn a spot but I know going in that X number are not up for grabs because those kids have proven they can play. Others say I have only 2-5 slots open and I'm gonna bring in a limited number to fill those slots of kids I think can help me.
As has been said, NAIA and D3 are notorious as a group for bringing in a lot of kids in the fall because they get part of their salaries for how many they have. If you are wondering, you better go look for yourself in the fall. Not a good time if you are one of the ones who is told in December that there is no room for you in the inn.