Surprisingly this happens after Google pagerank update 27 June last. Many of the domain co.cc its pagerank is also a rise or at least have a PR. But for what pagerank if no traffic from google. Useless high pagerank google but not indexed, because surely poor blog traffic. Unless the class website facebook or twitter, google indexed not too crowded because visitors tetep already memorized and knew a lot more than facebook or twitter on google.
In the forums many bloggers who feel disappointed that not even a little panda because it was not cursed domain index co.cc. Imagine there is a blogger who got 100 more blog with co.cc domain, used for adsense business, selling links, paid reviews keep traffic suddenly dropped to 0. Decrease in traffic is sure to happen if the domain is not indexed because Google did not send end to it.
Maybe google has been frustrated with co.cc domain because it is widely used for spam blogs. As for the dummy blog, AGC, MFA sites, or to waste backlinks. Or maybe google want to switch to blogspot bloggers on a more secure, although it could be removed by the blogger blog without notice.
Some friends already in bankruptcy bloggers co.cc domain because it can not clear up when going to google's domain deindex co.cc. We just hope that google would be kind enough to restore the deleted index for bloggers especially those using co.cc domain can continue ngblog. Of course we also have to know yourself if you use a free facility may someday be taken owners.
Co.cc domain name is actually wearing a lot of risk, the most severe it is not indexed. Another concern is taken it over co.cc domain name by the owner of the domain co.cc own party. There have been many who have taken over the grounds domain violates the TOS when blog traffic is secure. Finally, in vain all the optimizations that have been done.
The most secure does indeed have its own domain and hosting. We are not afraid of free optimization and domain taken over unless you do not pay for domain and hosting costs. Hopefully tetep spirit of blogging.....