While CentOS users might not represent that many IBM/RH customers, I suspect CentOS's availability has contributed to RHEL being so widely supported. If fewer

While CentOS users might not represent that many IBM/RH customers, I suspect CentOS's availability has contributed to RHEL being so widely supported. If fewer people, even people who will never pay, use CentOS, then (potentially) fewer people will explicitly target RHEL/RPMs, and there's a weaker case for enterprises adoption RHEL over its competitors. CentOS led to people learning "how to use RHEL". While RH is going to try to bring developers and other non-commercial uses into free licenses, I'm not sure this will be enough.