Just because the FCC approves of a merger doesn't mean that it's green-lit. It also has to go through the Federal Trade Commission and the Department of Justice for approval, which is still a chance of approval or denial. If the FTC and/or the DoJ deny the merger (even with FCC approval), then it's called off.
Right now, there are reports circulating that the FTC and DoJ bless the merger, but nothing has been set in stone from either agency to date.
Anyways, please stick to the topic, which is about data caps. If y'all want to discuss the Charter-Time Warner Cable merger, please do so in a new topic. :)