> Я про третью версию вечно забываю, так как она особо не используется
> и не нужна.

Глупость первая.

> Во второй версии это не оговаривалось

Глупость вторая, причём ещё бОльшая по той простой причине, что грепнуть-то элементарно:

$ grep -B6 customarily /usr/share/license/GPL-2
  3. You may copy and distribute the Program (or a work based on it,
under Section 2) in object code or executable form under the terms of
Sections 1 and 2 above provided that you also do one of the following:
    a) Accompany it with the complete corresponding machine-readable
    source code, which must be distributed under the terms of Sections
    1 and 2 above on a medium customarily used for software interchange; or,
    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,