Through ESF tools, you have everything you need to buy and sell subdomains of ENS top level domains. Subdomain owners get complete control over their subdomain and top level domain owners maintain complete control over their domain. You can also set a domain up to allow holders of a specified NFT collection to mint subdomains, which are then tied to their NFT, for free. Advanced functionality is being worked on such as whitelisting of wallets that can mint subdomains, and much more.