Plus, they're duplicating functionality, which they've been rather explicit in the past about not allowing.
And while Apple has been "explicit" about not allowing "duplicate" functionality, that standard is incredibly vague in practice and incredibly arbitrary in enforcement.
In this case, one of what I presume is the banned apps (the article doesn't mention any, grr!) supported some non-duplicative features for war driving assistance, as well as a "radar" view. So yes, some features are duplicated, just like Pandora duplicates some features (playing, pausing music) that iTunes does.
WiFiFoFum's product review/description page on MacWorld, with 1,549 reviews: http://bit.ly/bF4gMP
But its purpose is not to lower suckiness for developers, it's to lower suckiness for consumers. They're merely being consistent in that goal.