You know how it works. RealFaviconGenerator's server costs almost nothing. It runs Linux, Apache, MySQL... the classic gang. A $19 logo, some domain names, an SSL certificate... I can afford that.
The real cost of RealFaviconGenerator is not in dollars or euros, but in time. I have no idea of how much time I spent on it, and frankly I don't really want to know. But you can easily guess that it's quite a huge project for a single person.
So I would really appreciate if you could donate a few bucks!