I am the author of an open source cloud security tool (https://github.com/cloudsploit/scans https://github.com/cloudsploit/scans). We also sold a hosted version

I am the author of an open source cloud security tool (https://github.com/cloudsploit/scans https://github.com/cloudsploit/scans). We also sold a hosted version, which wound up becoming fairly popular and bringing in decent money. Last year, the team and product were acquired. There are numerous benefits to being open source. We built a community around the product, it played into marketing efforts, really helped attract developers at companies for bottom-up sales, and led to lots of improvements, many of them contributed by our paying users. My point is that open source and "making money" don't need to be mutually exclusive. In fact, sometimes the open source side can really bolster the commercial side. This seems most effective at companies that offer a hosted version of their open source product. Very few large enterprises want to run things themselves if they can just pay a company to run it for them or provide support.