Most gamers typically play games online, download expansions or other forms of DLC, watch hulu, stream music..etc.. generally speaking, use more bandwidth than your average user who just browses the occasional website or checks email. As such, Comcast feels they can charge those users more or block / throttle them. This led to the whole "Net Neutrality" fight. For those of you know up on what that means, it's basically the fight to keep the price of bandwidth static and common for all users.
You see, back in 2007 Comcast actually did start blocking and throttling certain types of traffic, and targeting gamers because they did use more bandwidth.. Well the FCC have been fighting it, but yesterday three federal judges sided with Comcast saying that the FCC "lacks authority to require broadband providers to give equal treatment to all Internet traffic flowing over their networks".. This means Net Neutrality is dead and really soon you can expect all broadband providers to raise their fees.
Read more about it here: http://finance.yahoo.com/news/FCC-loses-key-ruling-on-apf-78990100.html?x=0
This sucks for everyone.. Frankly it's a greedy ploy by all the companies involved and ultimately as with anything else, we pay the price. If Time Warner raises their rates I will leave. Vote with your wallet people..