Webmaster isn't going to "redistribute" the brushes. He/she only wants to use them to make backgrounds for distribution. A brush is a graphic tool, made with the intention of it being used. If the person didn't want their brushes used to make things, then why bother to make them in the first place?

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi