I've worked on FOSS before and got a handful of messages from people like this. They're very very few and far between, but I always found them fascinating because of how much it broke their worldviews.

They're usually people who control enough money that they can 'throw money at a problem' and it'll largely diminish or go away. They usually find a desperate enough vendor, employee, or subcontractor who will deal with their attitudes for enough cash, or quickly fire them if they can't.

They usually have the inverse attitude towards customers giving them money -- that is, they believe it's also part of their job to take abuse from those willing to buy.

So, most of their business transactions involve them giving or taking abuse with the threat of financial withdrawal if the abuse isn't accepted. It's how they define transactions. "Who's the abuser, who's the abusee?" The answer depends, strictly, on which way the money is flowing.

FOSS breaks their worldview because they're not the customer in the same way. They don't have that leverage. They're just an angry person on the street asking you to help them carry their groceries in, and at some point, if they realize it, it's priceless.