This is like someone getting kicked out on the streets, thanking everyone who offered to open their homes to him, but him informing everyone that he will be taking residence and refuge at one specific place.
Doesn't matter if the player is in limbo or not. Coaches or anyone affiliated with the school are not allowed to talk to kids about playing for their program until they are enrolled in that school.
I don't believe it is illegal as long as any bonus, supplement, perk, ect is coming from a booster club and not taxpayer money as part of the teacher salary or supplement.