Yes, i make money with ThePythonGameBook. 0,28 € in march 2011 alone, to be exact. That is an incrase of a googolplex percent above febrary 2011, where i made impressive 0,00 €.
I made this money with the help of the Flattr button. As you can see in the flattr revenue screenshot, flattr takes 10% of my 31 cent, leaving me 28 cent.
However, my monthly (minimum) flattr fee is 2 €, so i did not made any money out of ThePythonGamebook, i just lowered my monthly cost for Flattr by 14%.
Flattr is not my only source of income, i also have some Amazon ads in the wiki, but no Google AdSense ads. The reason is that i find google ads annoying on other websites so i want my own wiki to be free of it. Some plans to “monetize” ThePythonGameBook are to sell a paper version, an ebook version and a special version for teachers. All content of the wiki is licensed under a Creative-Commons-BY-SA license, meaning you are free to find your own ways of how to make money out of ThePythonGameBook, as long as the content stays free and you cite me correctly.
If you find a way to make money out of ThePythonGameBook, please send me some hints of how to to that, i'm open to suggestions.