At least that was the case with the Lenovo laptops I personally and also the company I work for (Linux shop) bought.
AFAIK the PC market is low margin, and the only place they really get margin is from all the crap ware they 'offer' and stuff like margins on windows licenses and such.
I think microsoft has realized the real price for windows is $10 too, which is why they are adding all the adware crap in it. Otherwise it's not tenable as a business for them, even if they are a selling a huge volume of it.
I'm sure that is where we are heading in the long term. I used to spend a lot of money on software for my business, now the majority of what I use is free. I can't see Microsoft being able to escape that forever.