The problem with TANSTaaFL is that it uses a completely different definition of the word free than normal English. Normally the word free only references the price paid by the consumer, not the cost of production.

If I give you a lunch without asking for anything in return, and without inconveniencing you, that's a free lunch for you. Of course somebody paid for it, but that doesn't stop me from giving it to you for free.

>Which is the point in context to someone saying "If only there really was universal expectation of free software...".

"I get my software for free but be offered the option to donate" is the model that's giving us Dwarf Fortress. It's free (as in beer) software in any useful sense of the word free.