All they did here was pre-install openstack, but leave you to keep it updated. If you can't install it yourself, good luck upgrading it when a security release comes out.

I mentioned ELB/EC2/Lambda/S3 equivalents for 2 reasons. First, AWS is clearly the market share leader, so having a similar pattern might get more buyers. Second, it's a bit easier pattern for apps that aren't cloud aware. But, they could just offer hosted K8S with some add-on ingress controllers.