But is Netflix an example of a company that's happy to be paying Amazon whatever they're paying them? I don't know the exact chronology, but I think Netflix pre-dates Amazon being in the Media business much, if at all?

Netflix also don't really have an option, outside of building their own cloud, since Microsoft and Google also have video streaming. It's a little different if you're a Sears or Walmart, and you're not directly competing with the other providers.

Same with Apple and Samsung. Sometimes you're stuck buying from competition because they're the only people making the thing you need. It doesn't mean you're happy about it or wouldn't jump ship if possible.