🚀 go-pugleaf

I think I've seen a thread like this somewhere in this newsgroup, but I
can't find it, so here goes my question.

As far as I know, if I write a software package and copyleft it, and
sell it to someone, what's to stop them from undercutting my price and
selling a mess of copies?  Is there any provision for further
resellings to automatically mark some percentage or fixed dollar amount
to go to the author?  Or are all your rights gone, including your right
to get some compensation for writing the original code?

If this has already been explained clearly somewhere, point me to it: I
don't think I've seen this question addressed, and invariably it always
comes up when I talk about the GNU Project to people who don't know
much about it.

Steve Boswell -- Future author of GNU Eiffel, if everything goes right
whatis@ucsd.edu
whatis@gnu.ai.mit.edu