I am no fan of Saban, but I will say the following -
I'm sure a lot of recruits buy his schtick hook, line, and sinker...but at the same time, I think a lot of recruits (and/or their parents/guardians) are smart enough to understand the risk they are taking signing on with a total shark of a football coach. They do the math and realize that they have a really good shot of getting to play on a National Championship team at some point during their 4/5 year career.
It's like deciding to buy a sports car. Terrible gas mileage, tiny trunk, classified as a "deathtrap" on the NTSB's highway safety scale, and you'll need a second mortgage to pay the insurance. But it's red, fast, loud, and will make your a-hole brother in law so jealous he'll want to puke. Next thing you know, you've got a shiny new sports car sitting in your garage.