The Evolving Market for Commercial Software Built On Open Source
That is no longer the case. While an awful lot of companies are still stuck running immense software packages critical to their infrastructure, new projects are being deployed on cloud servers using open source technologies. This makes it much easier to upgrade one's capabilities without having to rip out a huge software package and reinstall something else, and it also allows companies to pay as they go, rather than paying for a bunch of features they'll never use.
And there are a lot of customers who want to take advantage of open source projects without building and supporting a team of engineers to tweak one of those projects for their own unique needs. Those customers are willing to pay for software packages whose value is based on the delta between the open source projects and the proprietary features laid on top of that project.