My work is with DSLs: domain specific languages. The work is in the idea realm (most of the time is spent there), not the source code implementation, which is often trivial once the language is developed.

The gratification also is different. Seeing others use the language is the best one can hope to achieve nowadays. Maybe publish a book about it, but that sounds more trouble than it is worth (judging by how books on patterns, a similar realm, are often misquoted and misused).

That's why all this talk about licenses sounds like nonsense.