Dreaded Brush Curse!

How do you feel about resources like brushes which are only allowed for non-profit usage and require attribution? Do you have brushes like these installed or do you avoid them?

I personally avoid these resources like the plague, I feel they are a real pain. The last thing I want to do when painting is write down a list of all the brushes I used, or when I'm doing commercial works to have to go through and try to remember which brushes are OK to be used. It's actually one of the main reasons I started making my own brushes, I was absolutely fed up with all the restrictions on downloadable brushes. Now, with the exception of GPS, I only use my own stuff. Naturally, they don't have the above two restrictions, I certainly don't mind if people want to give credit, but if they don't want to or don't have time that's fine by me.

What do you all think?