"because RedHat is known to offer better sales force, better service and support"
And tremendously longer support periods.
Right now I'm helping a non-profit move from squeeze and XCP/XenCenter (which is CentOS), which I initially set up for them, to wheezy. And we're looking rather enviously at the RHEL/CentOS support periods. Even before this systemd debacle, something else was looking likely for when wheezy support ends.