Hi TheExpert,
I will give my take on this.
First, I have no problems with a $15.00 shader being offered in the "contributions" forum. It is a contribution, as I see it. That is not to say that it will be worth $15 to you -- it may not be worth it.

It may not be worth it to me, either. I am also concerned about frame rate issues and I haven't figured out whether it will run on my Nvidia desktop. But the price seems quite reasonable, so I am glad to know about the offer. I can't see how posting this hurt anyone, even if they don't want to buy.

Regards,