Buy or Rent domain names

Has anyone ever tried something like this? Seems like an interesting way to get a good domain for an early stage venture (pay a high but not crazy monthly with an option to buy in a year).

However, this seems to have few "brand" domains and lots of autoaccidentlawyer.com type stuff. That coupled with the fact that the guy who built it tries to hide his involvement with the site makes me think twice about using it.