Why I Pay for Draft and Other Free Products
medium.com
medium.com
You basically set up weekly donations to people through Twitter/GitHub. The best sell I can think of is for those well-versed in Python: how much time do you think Requests has saved you? An hour a month? How much do you value that hour? Let's be crazy conservative and say you value it $20/hr.
Kenneth Reitz saves you $20 a month. What's wrong with throwing him a little piece of that pie?