Netflix pays exceptionally well and is very selective, and I understand they are quicker to fire underperformers than most. So it is fairly prestigious and ranks at the top in compensation.
I'm guessing it's from the financial perspective, not a technical one. Netflix is a reasonably stable, well-known brand worth over $100bn and that has 100m+ subscribers.
From a salary perspective, I'd suspect they have to be competitive with the other companies for tech talent, so it's reasonable to include them here.
Edit: so many responses at once!