The Tor Project will launch a bug bounty program for researchers who find loopholes in Tor apps. Bug bounty programs are cash rewards gave by companies or organizations to white hat hackers and researchers who hunt for serious security vulnerabilities in their website or products and then disclose them. Tor Project is following in the footsteps of a number of major technology companies, such as Facebook, Google, Paypal, and Mozilla, which offer bug bounties in thousands of dollars. United Airlines made headlines by becoming the first airline to launch its own bug bounty programs.
Source: https://thehackernews.com/2015/12/tor-project-bug-bounty.html