Not to nit pick, but I think the word "incentives" is not what you meant maybe? "Incentives" falls under pay for play and is illegal under current NIL rules. However, "potential" earnings are legal and something UK does do. For instance if the University or some donor entity (with JMI licensing approval) decides to sell Diallo bobble heads, or mini basketballs, or jerseys, or t-shirts, or whatever, they can have a contract that provides Diallo a percentage of the sales of each individual piece of merch.
This obviously can't be "set" as an NIL hard number up front, so it is projected as a possible earn. It skirts pay for play rules, while incentivizing Zoom to play well and be likeable. The better he plays, and the more likeable he is here, the more UK merch with his name on it gets sold to fans, the more money he makes. Think like if EA makes a new NCAA basketball game and decides to use real player likeness. They'd probably work out a deal for a lump sum to each player, but they could structure it as a percentage to each player based on sales. The better the game does, the better the more money the player makes. Only in this case, UK is EA, and they're making shirts and hats and foam fingers instead of a video game.
This is why you will see some sliding scales on NIL offers. "We offered $3M-$5M for him" probably means we offered $2.5M in NIL, $500K in Rev Share, and the market analyzed potential of $0M-$2M in sales revenue on your likeness. And the media will report it as we offered/paid "X" player $5M in NIL without missing a beat.