Not-for-profit Open Bug Bounty project has demonstrated impressive growth and traction in its annual report from 2019. 203,449 security vulnerabilities were reported in total (500 per day), which is a 32% year-to-year growth. 5,832 new security researchers joined the community, taking the total number of researchers and security experts to 13,532. 383 new bug bounty programs were created by website owners, now offering 657 programs in total with over 1,342 websites to test.
Source: https://thehackernews.com/2020/02/open-bug-bounty-project.html