In April 2021, Cloudflare announced the revival of Project Jengo as a response to a patent troll called Sable Networks that sued them. The project is a prior art search contest where participants are asked to find evidence showing that Sable's patents are invalid because they claim something already known at the time the patent application was filed. Cloudflare committed $100,000 in cash prizes for winners who successfully find such prior art. The first chapter of this contest has now ended, and three winners have been selected to share a total of $20,000 in cash prizes. The contest is ongoing with $80,000 still to be given out.