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And isn't the Oracle Linux stream free to get updates from?
Yes its completely free. You can yum/dnf your updates just like CentOS. It is CentOS (RHEL). Their business model is hoping you will pay them for support if you need help. They also offer a paid feature that lets you update the kernel without rebooting, if it's important for you to never have to reboot and have down time.
But if you manage linux yourself, then nothing to worry about.
