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by ccoggins 4567 days ago
It's been necessary to pay for RHEL for a while now. When you pay your subscription, you do get support from RHEL as well. However, if you just want to try the OS, you can go get CentOS. Since RHEL is open source, the CentOS team removes the RHEL name from everywhere and recompiles it.

One market that it seems to be strong in is the defense world, since RHEL is one of the few OS' that get various certifications for safety and security.