Sure, but how would we know if those did get leaked? I'm sure it happens all the time. We just know about consumer-product leaks because they're being leaked to us, the public.
That's fair. It's certainly true that business data associated with any high-profile company is going to be of a lot of interest, especially if it's something that a lot of people want to know but the company has refused to make public.
And listen to just about any earnings call and you'll hear lots of financial analysts trying to extract some more "color" from behind whatever numbers were released.
Nielsen, studios, and the press would love to get their hands on Netflix’s viewer numbers and associated demographic data for a given show or movie.