Dremio does benefit from Apache Arrow publicity and notoriety, even if they don't profit directly. Having a de-facto standard data format and open-source engines is a selling point for some. That's why Dremio explicitly calls it out on their own website. It also never hurts in the recruiting department. (edit: there's a reason the article was submitted by someone working in marketing & strategy)
>> I’m wondering if Wikipedia can continue to be considered a reliable source of information for technical folks who want to learn more about the vast system of Apache open source software projects.
Sign up for the Olympics, because that's a hell of a leap. You didn't get your page in, it's really not much of a reflection on the rest of Wikipedia. It's an open-source project. It should have it's own freely available documentation that fills much the same purpose anyway. If I want to learn about Apache X, I go straight to x.apache.org. They concede that it's not an end-user product anyway, so I'd think their key audience knows how to find an open-source project website. Lower the bar too far the other way, and there are plenty of semi-open-source project's marketing departments would be all over using Wikipedia to their own ends - I've seen my own former employer do this for their Apache projects.