I run the Hackathons program for CockroachDB. Stats for the Spring 2021 season:

🛠 31 Hackathons 
👩🏽‍💻 14,863 Developers reached 
🤩 190 Apps created (https://bit.ly/2WHWeSS)  
📝 378 Workshop attendees 

Fall 2021 season begins today!