I think this is fair: for hobbyists, a free zonal cluster is sufficient and you probably wouldn't use more than one cluster. For businesses/revenue drivers, the $7.30/mo/cluster is nothing (EDIT: actually $73/mo/cluster, which may be a tougher sell but if the business is in a case where it benefits from Kubernetes, it's still likely insignificant relative to the cost of actually running the VMs on it )