I doubt the students are receiving monetary compensation while they're in high school. Organized crime rings are not stupid. If you give a 16 year old thousands of dollars, he's going to go out and buy something expensive and then brag to his friends about it, and it's going to quickly get out.
It's likely an unsigned verbal agreement to an agent/fixer who pressures/convinces the students' family or mentor, who steers the child to that college, and then to that corporation, while the corporation and the college receive the money. The colleges and corporations are experts at this and they're not involving the fixer or the agent in any negotiations with a child... It's all about promising opportunity to poor children to entertain, but at the other end of that conspiracy is a government employee making $1.1m, getting a kickback from Adidas, and the brand manager for a billion dollar company. The poor kid is a pawn, as always, with millionaires using his life to fatten their wallet... It just so happens that this particular brand of exploitation also has RICO charges attached to it. This isn't just about the 14-year-old prodigy who goes to a major program, leaves after 1 year, and then gets a major marketing deal for Adidas to sell sneaker... It's just as much about the 14-year-old prodigy who gives up school to focus exclusively on basketball, who drops out of the major program, and who then has to work at Footlocker for $9/hr selling sneakers with no future.
Fraud, bribery, pay-to-play conspiracies rarely involve the actual talent on an individual level, especially with compensation. The Chicago Black Sox are the most notorious bribery story in sports, but the people who made out the best weren't the poor athletes, it was the mob and gambling syndicate.
It's not only a child exploitation scandal either, assuming charges come to fruition after the investigation. It's going to primarily be adjudicated through fraud, bribery, and conspiracy, and this is all involving some of the highest paid government employees in the country, and tax exempt institutions that receive millions in state and federal funding (or are actually government institutions). The laisse faire, "it's just college sports, who cares, we already know it's corrupt!" attitude of many others is nonsense, these are people who the taxpayer has hired, committing fraud, conspiracy, and bribery using children in scandals involving multi-billion dollar multi-national conglomerates.