Like Goodwill Industries, the United Way is set up regionally, with distinct organizations, staffs and headquarters in different parts of the state. Depending on the companies and charities with which they work, this may or may not make sense from a cost effectiveness perspective.
I don't actually know whether this is true, but I've also heard the United Way establishes a formula for determining how much each charity gets, rather than simply passing through donations as designated. As a result, an additional $100 dollars donated to a particular charity might result in $100 more going to that charity, something less than $100, or even nothing at all, depending on the distribution scheme established by the Board beforehand. If there's any truth, it's one more reason to donate directly.
Ken