and a small business doesn't?
If CBS Corporation is looking like it is under-performing in any given quarter, they'll look at their subsidiaries, which include CBS Interactive. If the websites aren't meeting growth expectations, they risk getting restructured, facing layoffs, or being sold outright.
If a small business posts steady year-on-year performance, everyone gets paid, and theoretically everyone is happy--they're doing what they like, and they are making money. As part of a corporation, stability isn't what is rewarded, constant profit growth is expected. As part of a media conglomerate, you are at risk of facing management restructuring and shared services which will change things, maybe for better, maybe for worse.
If GB doesn't constantly expand, they are going to be in a possible bad situation as part of a conglomerate; as an independent website, they could grow at their own pace, now they are beholden to the pace that is dictated by a board's expectations.
I'm not here to make judgments on what is going on, but the gains/profit expectations for a corporation and a small business are certainly quite different.