I wouldn't say Discovery necessarily changed it's format as it still primarily deals with science/nature/educational stuff.
However, TLC ( THE LEARNING CHANNEL~!!!!!) is completely fucked up from what it used to be.
Well, depends on how you look at it. If you consider that the Wi-Fi adapter for the Xbox or any "game adapter" for that matter, retails between $70-100 bucks, you could say that part of the cost is there.