>Unless the people are being forced to work/buy/sell with amazon, they are by definition not being exploited.
"forced" can happen in more ways than one. Workers in third world sweatshops aren't forced by law to work there, but they are forced by capitalism to work there to feed their families.
Employees who freely take the best option available to them are not made better off if that option is removed.
I don't believe that Bezos or other employers are acting selfishly when them employ people, even when they make a margin on that labor. (In fact, if they don't make a margin on that labor, they would be better off to stop employing that person, meaning the situation where the employee and employer both make money on the deal is the most stable state.)
They are made better off if their wages are improved, ie if they organize and struggle for a minimum wage or a union. Employers will work their employees as much as possible for as little pay as possible, only the law and organized struggle prevents them from paying less. Capitalism encourages businesses to reduce their costs as much as possible, including labor costs, so obviously they will do anything they can to pay people less unless they fight back
"forced" can happen in more ways than one. Workers in third world sweatshops aren't forced by law to work there, but they are forced by capitalism to work there to feed their families.
Also: Exploit (v)
2. To use selfishly for one's own ends.