Sounds similar to http://lowendspirit.com/ where you get a a port range on an IPv4 address, and x amount of dedicated IPv6 addresses.
Super cheap, great for a private VPN or two.
We're offering a similar service, spoke to the owner of LES yesterday who is quite [happy][0] with us offering the community a similar service since it's not really profitable but more as an effort to help the community and offer something cool.