"From what I saw, he created the images in poser, stripped the color out, and then "colored" them himself. I'm wondering why?"

I personally don't like the end result of just applying some PS actions to straight-up renders. Opposed to the OP, I don't think the images done that way look good at all. Then again others may not like the more hand drawn -like illustrative style I'm striving to go towards with my work. People appreciate different things and for different reasons.

When I'm creating an image, I much prefer the liberty I get with Photoshop and my Wacom tablet using the render(s) only as a starting point to be shattered, mutilated and bend into the final form. I don't like something in a render? Fine, I can draw over it. I don't have an appropriate beard model? No problem, I might as well draw the beard I want. I totally understand the design choices made by the makers of Anomaly.

I mostly make just still images but with a style reminiscent of comics. For example here is a simple image composed of Poser renders post-worked in Photoshop.