[theevilsharpie]

One of the main use cases for CentOS is situations where you need to run proprietary third-party software that the vendor only supports on RHEL, which is unfortunately common in the enterprise space. CentOS is (well... was) intended to be a fully binary-compatible rebuild of RHEL (bugs and all), which provides a way of running this proprietary software without also needing to pay for and maintain licenses for the host OS.