Buzzfeed has proven itself by now to be a legitimate news source, even if the money is coming from the other division (clickbait). And not just tech stories: when big-name publications cut their education coverage entirely, Buzzfeed hired a reporter dedicated to it.
I would expect similar penalizing treatment of other "mixed-quality" sources like Quora, Forbes, Techcrunch, Business Insider, etc.
The problem isn't the legitimacy of Buzzfeed; it's that the low-quality content comes from the same domain as the high-quality stuff, and so if you do nothing to penalize that domain, you get cat pictures on the front page. It's not a moral judgement, but rather a practical measure.
I would expect similar penalizing treatment of other "mixed-quality" sources like Quora, Forbes, Techcrunch, Business Insider, etc.