* There's nothing about who is doing this or why.
* There's no way to actually pay that I could find.
* There's no information about overhead, or if the GratiPay is pocketing the money.
It's just a half-baked half-finished web page. I think a good not-for-profit here might be helpful? But I'm not sure how to structure it so that it is. I don't see why a business would actually want to pay. Most managers believe they have a fiduciary duty to maximize shareholder value. This doesn't help.
And the money raised? I'm not sure a serious analysis has been done by anyone. As an open source author, I'm not inclined to even deposit a $0.32 royalty check.