Didn't it happen with Google? Did they not build a more productive engineering department because they said "Bring your whole self to work, and bring your dog too" and not "We want your butt in a cubicle for 40 hours and this is just a job"?
I suspect if a company says "Bring your whole self to work, and we're actually serious about it, only bother applying if you think you'll gel with the folks already here," they'll still be able to hire as many people as they need and they'll deliver better products because of it.
How are they “more productive” than the other tech behemoths?
I would argue that they are less productive seeing that after all these years they haven’t diversified from advertising - where 90% of their profit comes from - as compared to Apple or Microsoft or even Amazon.
I suspect if a company says "Bring your whole self to work, and we're actually serious about it, only bother applying if you think you'll gel with the folks already here," they'll still be able to hire as many people as they need and they'll deliver better products because of it.