I don't see anything stopping boosters from starting Speculative Signatures, LLC and throwing what they used to donate to the school in as an annual investment. Recruits get paid whatever it takes to get them to go to School X in exchange for a signed football. Sell or donate the footballs, write off the losses, and now you maintain your tax deductible donations but have a direct impact on the program, which is what they want in the first place.
I think this is going to have a big impact on donations to athletic associations and women's scholarships.