I'm looking at increasing my photoshop brush collection and I keep coming across this license: Attribution-Noncommercial-Share Alike 3.0 for example on this page: http://qbrushes.net/grunge/hi-res-mess/
The license asks for attribution back, well if I'm using it in a design for a commercial client's website, how does one do that?
The license also says it cannot be used for commercial work, but the description says "License: you may use them as you wish for commercial and none commercial use. Enjoy."
Now I'm confused...