Facebook Inc. (NASDAQ: FB), the most popular social media site, attracts 2.01 billion users a day, as of June 30, 2017. Most people know how the site works. Here are seven lesser-known facts about the company.

How Zuckerberg Hires and Fires

Mark Zuckerberg’s guiding principle is to hire those for which he would want to work. He also prefers young geeks, telling the Stanford Y Combinator Startup School in 2007 that young people with technical experience are smarter than older ones. The Facebook founder walks the office with a samurai sword and fake-threatens employees who perform bad work by telling them he’d chop off their heads. One of Zuckerberg's best talents, peers say, is his ability to fire people.

Hacking Facebook Got This Employee Hired

In 2005, a guy named Chris Putnam hacked into Facebook and reprogrammed thousands of profiles to look like MySpace images. Unfortunately, he also deleted some users’ contact details. Facebook's COO, Dustin Moskovitz, hired him as an engineer. Putnam was lucky. In 2004, a guy who hacked MySpace was arrested when he arrived at LAX for a supposed interview with that company.

Zuckerberg Has Red-Green Colorblindness

Zuckerberg has red-green colorblindness, which is why Facebook’s color is blue. The Facebook founder described blue as his richest color. Nor does it hurt that blue, color of heaven and sea, is traditionally associated with reliability, responsibility, trust and security. These are concepts that may help viewers part with their information.

Facebook Curators Exert Political Bias

Perhaps not a secret anymore, but Facebook's trending news section came into question after a 2016, Gizmodo article quoted Facebook curators saying they were told to artificially introduce certain topics or delete others. Inserted topics discuss liberal-based issues such as "Black Lives Matter." Suppressed news was mainly right-wing or Republican-oriented. This fueled the fake-news debate which rose in 2016, and continues into 2017.

Facebook Founder Earns $1 a year

While salaries of top-company CEOs set tongues wagging, Facebook's CEO, Mark Zuckerberg, earns a paltry $1 a year. He also denies himself stock options, equity awards or bonuses. When Zuckerberg announced this decision in 2013, he explained that he had made enough money and was focusing on philanthropy. Of course, the company still pays for his travel and security, and Zuckerberg is worth $56 billion, according to Forbes 2017 rankings.

Bug Hunters

Facebook has its Bug Bounty Program that rewards voluntary security researchers with at least $500 for reporting security issues on its website. Any person, anywhere, who finds and reports a security bug is given a "White Hat" black debit card that can be reloaded with funds each time the person finds a new flaw. India has the largest number of bug hunters in the world. America follows, then Russia, Brazil and Britain. In March 2016, a 22-year-old security engineer at India's Flipkart won $15,000 for discovering a bug in Facebook that could grant access to personal information such as photographs, messages and credit or debit cards, all without the user's knowledge.

Facebook’s 3.57 Degrees of Separation

Forget six degrees of separation. Facebook’s 2016 statistics show that Facebook has shaved gaps of connection to 3.57 degrees, meaning that each person on Facebook is connected to every other user by approximately three and a half other people. Facebook aims to make the world more open and connected. It seems to be succeeding.

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