You do not deserve a donate script if you are not willing to pay a small amount of money for it. Seriously? You expect to gain LOTS of money through donations (and I am almost 100% sure most of it will go into your own pocket, if not all) and you can't even spend a few bucks on it...
And do you honestly think people make all of their stuff in a few minutes? Certain things require a lot of time, and if they then decide to request a bit of money for it, you should accept that one simple fact. Pay or don't. Simple as that.
Oh and, that signature you are using? Guess who made that? That's right. I did, and for free. You should be lucky people even consider releasing stuff for free when there are annoying pricks like you expecting everything and does nothing for the community in return.