Actually MSNBC is owned by a large cable company, Comcast. Fox News is owned by News Corp.That's a good example. Of course "payola" has always existed, but I feel like there has been an extreme increase in this type of thing over the last ten years. Every time I visit a site like Gawker, Mashable, Lifehacker, Cnet, PCMag, et al. it seems to have become more blatant.
Best examples of 2013 here: The Best Sponsored Content Of 2013 | The Content Strategist
At least Huffpo is being up-front about it: HuffPost Partner Studio
I used Hannity and Maddow as examples of poor ethics because I heard they were the most extreme. I don't watch television "news", so I've only seen a few clips of them. Maddow works for the giant military contractors Microsoft and General Electric, so that's who she serves. I don't know which bank owns Fox.
All of us must grow more sophisticated at detecting bias in the "news". My kids are actually better at it than I am.
And you can't judge the content of Hannity and Maddow by clips, which may be taken out of context.