As the above article points out, the forgiveness of royalties may be not so much an 'unwritten rule' as it is conscious (or not) non-enforcement by the licensing agencies.
"It takes a lot of devotion and work, or maybe I should say play, because if you love it, that's what it amounts to. I haven't found any shortcuts, and I've been looking for a long time."
-- Chet Atkins
-- Chet Atkins
