I'm gonna get hated on for this, but I don't think "give back" is an open source concept. I'm not aware of any Open Source license,or Free license for that matter,that has a give-back clause. Source code is available to -users- ,not prior-authors. Some Open Source licenses can be used in proprietary code, (MIT, BSD etc) with little more than simple attribution. Those developers chose that license for a reason, and I'…
> I'm not aware of any Open Source license,or Free license for that matter,that has a give-back clause. §5.c of the GPL Version 3 states explicitly: > You must license the entire work, as a whole, under this License to anyone who comes into possession of a copy. This License will therefore apply, along with any applicable section 7 additional terms, to the whole of the work, and all its parts, regardless of how they…
Available to all users. Not previous authors. There may be overlap, or there may not be overlap.
Plus, I would say it's giving forward, not back. If there are public users then the original authors can become users and get the code. But there will be bug fixes and features smooshed together.
Which is why i posit that there's no "give back" concept in the license. Only "give forward".