I don't get it. I can understand performing acts of generosity without saying anything about payback and with no expectation of reciprocity. I can also understand performing acts of generosity without saying anything about reciprocity while having some expectation of reciprocity (like, "I'll do someone a favor, and it sure would be nice if they return a favor one day").

But why would you very deliberately choose a software license which very explicitly distinguishes itself from normal proprietary software licenses by spelling out how it requires no payment and will always require no payment (and in some cases, explicitly prohibits anyone else from requiring payment!), and still maintain an expectation of payment?