Most of us Centralnic domain owners are fully aware that ".us.com" is a subdomain and not an icann extension and we have taken a calculated risk. For example, I have carefully looked at Centralnic, they have many valuable 2 letter domains and they are making a lot of money from selling their subdomains, I believe that they will be around for the long term. If they are making good money selling subdomains (and they are) they would be crazy to suddenly decide to stop supporting their customers or get out of the business.
If you stop and think about it, buying any domain is a calcualted risk. You're betting that a totally new system to navigate the internet won't overtake domains any time soon (which many companies are working on). Your betting that an enterprising company won't find a way to market keywords so well that they'll effectively replace domains. Your betting that China won't come out with it's own Icann with a whole new set of domain extensions that, with all the anti-americanism going around, could overtake Icann if enough other countries jumped in (until it was shown to be reportedly false, there was news reports that China was thinking of doing exactly that. Honestly, I bet they are thinking of it and I think they would succeed). Your betting that the US won't finally give in to the international pressure they are currently under to transfer control of Icann to the United Nations and that the United Nations (proven to be the fair and intelligent institution that it is (LOL) could do any number of things to make the value of your domains decline. Maybe they'll add many new extensions that will water down the value of all domains or raise the rate of a .com so much that only big busiensses can afford to own them.
Considering these factors, is buying a subdomain from Centralnic really that much more risky than buying any domain?
Lee, look at their list of 2 letter domains for a second and tell me if they don't have a great business plan here. If you owned these domains, wouldn't you do the same thing as Centralnic?
yourname.ae.org United Arab Emirates
yourname.br.com Brazil
yourname.cn.com China
yourname.de.com Germany
yourname.eu.com European Union
yourname.gb.com Great Britain
yourname.gb.net Great Britain
yourname.hu.com Hungary
yourname.jpn.com Japan
yourname.kr.com Korea
yourname.no.com Norway
yourname.qc.com Quebec
yourname.ru.com Russian
yourname.sa.com Saudi Arabia
yourname.se.com Sweden
yourname.se.net Sweden
yourname.uk.com United Kingdom
yourname.uk.net United Kingdom
yourname.us.com United States
yourname.uy.com Uruguay
yourname.web.com The Web
yourname.za.com South Africa