Seems to exist since 2010: https://thunk.org/tytso/blog/2010/01/20/the-transitive-grace-period-public-licence-good-ideas-come-around/ https://thunk.org/tytso/bl

Seems to exist since 2010: https://thunk.org/tytso/blog/2010/01/20/the-transitive-grace-period-public-licence-good-ideas-come-around/ https://thunk.org/tytso/blog/2010/01/20/the-transitive-grace... Originals version of the license: http://zooko.com/tgppl.html http://zooko.com/tgppl.html Seems like the goal was to keep the product under copyright for some time, giving it a opportunity to recover costs or integrated exclusively inside a product for a while, giving some advantage over competitors, but making it a public-license after the period. Also found this explanation: https://tahoe-lafs.org/~zooko/tgppl.pdf https://tahoe-lafs.org/~zooko/tgppl.pdf