To be clear: There definitely is useful information in this piece, and it was worth publishing. At the same time, I imagine Engine Yard are quite happy with it too.
Also, I didn't mean to imply this might have been a paid article. It clearly contains balancing information.
That said, there's nothing wrong with paid articles, IFF they go through the usual editorial process (with an exception made perhaps for needs for balance) and are marked as such. If LWN felt this was a way to raise revenue, there would be no shame at all in it. This subscriber, at least, would be quite happy with them, as long as the main text was a click-through to a separate page and LWN feed and weekly pages were restricted to an easily-scrolled-past abstract.