There's some really interesting tidbits in the docs section.
For example, apparently AGPL licensed projects can't be used at Google: https://opensource.google.com/docs/using/agpl-policy/
For example, apparently AGPL licensed projects can't be used at Google: https://opensource.google.com/docs/using/agpl-policy/
Google no doubt has some proprietary code that they would like to keep proprietary. Also they probably have code under other licenses that they would like to remain under those particular licenses.
The others were just created, presumably to be reddit-level-hilarious