DrWho, I'd assume I'd pay a royalty especially if my end-result product was a pay-for product.
But if I was doing further open-source or freebie products, maybe the no-royalty deal would be made "as long as end-product is free."
ImgBurn is included as links into several packages, as are codecs galore, and I assume all of these agreements-to-use are royalty-free as long as the end products are.
Back in 2003 or so, when Nero 5 and 6 were being sold, they included a free-to-use LAME MP3 converter to burn MP3 files directly into .CDA formats on audio-CDs.
But somewhere between Nero 6.613 and 6.615, LAME insisted on getting payments "or else". Nero wouldn't pay a per-license fee, so LAME insisted NERO issue a program update (Nero 6.615) that stripped the LAME MP3 services out. "You can add this with a $14.95 purchase thru us, your friends at Nero..."
I've always wanted to know, uh, so how much of THAT was LAME getting? All $14.95? Or was Nero doing a "shipping & handling" fee for that?