Dpreview.com died when they got taken over by Amazon. Maybe the forums were worthwhile for a while after that, but the main site sure wasn't. Bigcorps just don't get what makes their acquisition targets tick.
And it's not the first time that a niche-expertise site was killed by a conglomerate. I'm still pretty salty about Google strangling Zagat, to mention just one similar case.
Of course they get what makes them tick. But they also don't care what makes them tick, they care about whether they generate (temporary) income. The biggest bigcorps don't even care what the thing itself is about, they just look at "what's the return if we buy it, and if so, what will make us more money: keep running it, dismantle it and use parts of it to improve other parts of our company, or shut it down once the revenue dries up".
Bigcorp operate like ant colonies, and run based on what's best for them. It's literally the defining aspect that separates small business from big business. In the former, people are in control. In the latter, the business is in control.
And it's not the first time that a niche-expertise site was killed by a conglomerate. I'm still pretty salty about Google strangling Zagat, to mention just one similar case.