Earlier quoted context omitted.
To me it was literally the most straightforward Linux distro: RHEL without the license & trademarked material I've been leaning on Debian-based distros for my own servers for a while now, but I still use CentOS in the lab. Hopefully RedHat provides an easy way to legally develop on RHEL without messing with a license.
RedHat provides developer subscriptions to their products: https://developers.redhat.com/articles/getting-red-hat-devel...
_In the first half of 2021, we will be introducing low- or no-cost programs for a variety of use cases, including options for open source projects and communities, partner ecosystems and an expansion of the use cases of the Red Hat Enterprise Linux Developer subscription to better serve the needs of systems administrators and partner developers._