[ChatGTP]

It doesn't seem like there is any relevant "former management" though?

The guy who is spearheading the case worked there during the time the promise was made and then for sometime after. So he either didn't mention it to the new owners on purpose (unlikely), or more likely, he has evidence the deal was acknowledged or at least known about by new management and still was not paid.

The lawsuit was filed in June by Mark Schobinger, the company's former head of compensation, on behalf of himself and thousands of other current and former employees.

He left in May, the promises were made sometime before he left and the case was established in June.

Sounds like the information was available but someone didn't do their due diligence and ask enough about the compensation structure before finalizing the acquisition ?