Obviously, CoreOS is going to start wanting your money pretty soon, as well.
Having worked for one of the earliest commercial linux distributors, I have little faith in such an effort to get anywhere. Red Hat and Canonical can barely make a dime.
Mesosphere isn't really an alternative to etcd, though. It relies on Zookeeper, which isn't perfect, but is much more battle torn than either Consul or etcd.
I have high hopes for something to replace Zookeeper, but I'm not deploying something in infancy which inherently can't heal from outages.
Redhat Fiscal 2015 revenue: $1.79 billion. Net income: $180 million.
Their fastest growing business areas are incidentally exactly in this space: OpenShift, OpenStack and Ceph.
Mesos is an Apache project, did you mean Mesosphere?