Windjammer is its own company that just bought some of the smaller systems Time Warner and Comcast shed after the Adelphia transition. It has no relationship with TW or Comcast.
Brighthouse is also its own stand-alone private company, but Time Warner's Road Runner subdivision manages their Internet operations (similar to how @home operated back in the late 90's).
Windjammer is the spin off of the TWC areas and they still use RoadRunner email addresses; at least in Ohio they do. And how do you figure Winjammer is its own company? They appeared out of no where and started with the former Adelphia markets.
Brighthouse also is OWNED BY TWC and Advance/Newhouse. The areas they service are actually former TWC areas. TWC still even negotiates contracts for BH. -- www.twopugsbrand.com Kosher, Vegan, and Organic Certified Dog and Cat treats/foods and other products!