I don't really think Amazon should be included with the other 2. I can't think of anything they've made that was "planned to be a breakout show" and didn't succeed. Their pilot program that they used to run might've been the reason for that. They're also really quick to give up on series that don't do well (which is pretty similar to Netflix).
The Grand Tour maybe hasn't become the cultural touchstone that Top Gear was, but i'm fairly certain it's still getting a ton of views. Every top gear fan i know watches it. It's not getting the buzz a new show would because it's essentially just more Top Gear, but it's definitely being watched.
