One possible system for ensuring domains would be fairly used is a google based one: When you register a domain, it initially sits alongside a high entropy str

One possible system for ensuring domains would be fairly used is a google based one: When you register a domain, it initially sits alongside a high entropy string, like mything.3ku23j9. You then get traffic and links to go to your domain. If you get sufficiently popular, google will show your domain as one of the first hits for "mything". At that point, you get the mything domain bare.