Startup Founders often say, “do things that don’t scale”. If I were trying this, I might just register the domains in my account, list myself as the admin, and list them for everything else. No building necessary until you prove the idea.
Exactly. For a $99/year subscription it makes sense to manually perform a one-time setup. That being said, domain name registration APIs are a thing [1]. Hosting should be even more trivial with a multi-tenant architecture.