Meaningless except that Trump is sueing the first girl who (apparently) told the truth about this.
On what basis? Contractual limitation on what she could say? But contracts are two-sided things. If the game was rigged, the other side may have breached first, releasing her from her side of the contract, in part or in full, depending on how its written.
Ignore my previous post. The cause of action appears to be defamation, not contract. That would also seem to be an empty threat. Truth is an absolute defense, and a “tie” (ambiguity about what the truth is) usually goes to free speech, especially when dealing with public entities. Defamation suits are notoriously difficult to win. IMHO, they’re probably just trying to bully her.