<span>Bartering can be more time-consuming than trading with money.
Hope it helps.
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Microsoft<span> was </span>considered a monopoly in the late 90's because <span>there was effectively no other option than to use Windows, so Windows </span><span>had </span>monopoly market power, especially in the <span>"Business Operating System" market.</span>
<span>Microsoft could set prices for users, and dictate user's behavior.
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It's a <span>partnership. I have to write more words but that's what that arrangement is.</span>
It was very good I lead them army of students at a football team