There were two things worth pointing out - the acquisition price was lower b/c the founder wanted to walk away and
>>>As part of the structure of the deal, Xenon guaranteed I’d take home $3.7m, regardless of what came up during due diligence. This was important because many times, after months of due diligence, things invariably come up that reduce the purchase price: working capital requirements, unpaid PTO, unrecognized revenue, and a thousand other things. And I wasn’t interested in dealing with that.
I wanted stability and I wanted that $3.7m outcome to hit our family’s financial goals.
Given those terms, I believe the author when he says that this was the best offer he could get that met his terms. If that is true, had the investors insisted on their cut, he founder wouldn't have hit his family financial goal, and would not have sold.