They charge $19 PER PAGE just to have "permission" to remove their name. That should be all the proof you need of their business model.

If you need more though, the "$39 a page" actually ends up being $254 a page, if you want..

* responsive.. * tested/compatible with Chrome, Safari or Opera... * accessible * commented css * commented markup * using a css grid framework * html5 * microformats * speed optimisation * sprites * a favicon * PERMISSION TO REMOVE THEIR NAME FROM THE PAGE

This is why people think "PSD to HTML" services are a thing of the past - operators who are stuck in the past and think using modern standards is a reason to charge 2x or 3x the stated price. Seriously look at their pricing page - they add the per-page price again just to use HTML5 instead of XHTML Transitional, and again to use a CSS grid framework.