Hmm interesting, that's a subtle change between gplv2 and v3 I was unaware of, thanks! For completeness, GPLv3 has the following option available: >c) Convey

Hmm interesting, that's a subtle change between gplv2 and v3 I was unaware of, thanks! For completeness, GPLv3 has the following option available: >c) Convey individual copies of the object code with a copy of the written offer to provide the Corresponding Source. This alternative is allowed only occasionally and noncommercially, and only if you received the object code with such an offer, in accord with subsection 6b. Whilst the equivilent in v2 ( https://www.gnu.org/licenses/gpl-2.0.en.html https://www.gnu.org/licenses/gpl-2.0.en.html ) is > b) Accompany it with a written offer, valid for at least three years, to give any third party, for a charge no more than your cost of physically performing source distribution, a complete machine-readable copy of the corresponding source code, to be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, [next clause] Which is a lot less restrictive over when you can use the written offer approach.