What Tuberville did you really can't do anymore. He had limited scholarships, but he'd sign a bunch of guys as walk-ons. It was before the internet rage over recruiting really took off, but I remember us bringing in some classes of 40 or more players signed each year in those early years, most of them nothing more than invited walk-ons that signed with us. It was a good strategy, because you're throwing a big net out there. You may only get 3-4 really good SEC caliber players out of those 20-25 invited walk-ons each year, but that's 3-4 more that we wouldn't have had otherwise given the scholarship limitations of our probation.
I believe they have an overall roster limit of 105 now and of course the scholarship limit is 85 now. I believe the scholarship limit was 95 back then, and I don't think there was a roster limit, or at least it was much higher.
That's similar to the way Nebraska built themselves into a power, with a great walk-on program. You can't really do it that way so much anymore, because you don't have that many walk-on spots to take chances. If you're looking for diamonds in the rough and you cast a wide enough net, you're going to find some, but the nets are smaller now than they used to be, which makes that more difficult, and you have to actually sign most of them to scholarships.