Not linking to a company described in a news article can be annoying but it's not always some casino mentality code they have against outlinking to maximize internal pageviews -- in many cases it's also journalism trying to hold onto some standards of not just being a shill for the interview subject.
Not linking to a company described requires a very conscious effort. It's obvious that when you want to tell people "hey, look at X", you want to point people towards X somehow. If you don't do this, then it means you have some ulterior motive for not doing that.
I'd think that would work against the claim being asserted - that external links affect neutrality - given how closely people watch the BBC for any possible bias and berate it for assumed bias (with or without cause).
The digital equivalent of casinos' lack of windows.