It because the source of the money has cynically evaded tax for years and pays some of his workers less than they need to live such that they are supported by food stamps. The working conditions in Amazon factories are notoriously tough.

It's hard to take charitable giving seriously when someone has run their company in a cutthroat manner for years at the expence of some of the poorest workers.He could do better with his own businesses first.

I hope it works out and does some good but I hope this explains to you why people are cynical.