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.
Originals version of the license: 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