I ALWAYS read the readme on merchant resources, and pretty much anything else I purchase from renderosity before buying.  

As to what joequick has said, whooooaaaa that has me HEATED right now.  I was completely unfamiliar with 'filter forge'.

In all honestly, most of the copyright hoopla that goes on around here is laughable at best most of the time.  This however, is clearly questionable ethics.  I would not doubt one single bit if your post on this issue goes missing in the very near future.  

I have a new texture set coming out right now, it's called: color me pissed.

I am:  aka Velocity3d