This beef applies to both commercial vendors using corporate logos on their "customers" pages, as well as open source projects wanting to hype up their community.
Why ?
Simple. $big_corp is BIG. I'm sure if you look hard enough you'll find all sorts of commercial and open-source technologies being used at $big_corp.
It doesn't mean they use it for critical functions or even any production functions.
And then when we start talking about "tech-savvy" $big_corp such as Uber, then its almost guaranteed they've got some devs sitting somewhere playing around with bleeding-edge tech .... but it still doesn't mean they are using it in production, or will be using it "soon" ... that tech might well get bored of X/Y/Z move on to the "next big thing".
Or they might deploy it to production but only in Beta test to select customers, or A/B testing to larger groups.