I was curious so I decided to post some of the Google links about this:
* man page: http://manpages.ubuntu.com/manpages/trusty/man1/pollinate.1....
* Q&A style blog post: http://blog.dustinkirkland.com/2014/02/random-seeds-in-ubunt...
* A "why this is scary" blog post: https://tim.siosm.fr/blog/2014/04/25/why-not-ubuntu-14.04-lt...