Gnu Linux facts

While investigating facts about Gnu Linux, I found out little known, but curios details like:

The main programmer responsible for writing and maintaining the GNU Privacy Guard (used by journalists and security professionals) almost went broke, but he received funding from Facebook, The Linux Foundation and Stripe after an internet article pointed out his dire financial situation.

In my opinion, it is useful to put together a list of the most interesting details from trusted sources that I've come across. Here are 1 of the best facts about Gnu Linux I managed to collect.