I don’t know about all of the sites you are talking about, but communicationtube.com doesn’t list ANYTHING about who they are on their site. But they want you to enter in your username and password for all of your accounts, including Google, which can then be used in AdWords, Adsense, Blogger, and everything else Google offers.

Since communicationtube.com is based in Russia, there is NO WAY to tell if you can trust them not to sell or use your information, so unless you want to take that risk, you should not give out your user account information.

In general, you should not trust ANYONE with your information unless you really know who it is. If you don’t, you are just asking for much more trouble than you want. And remember that they can also SPY on all of your IM and other stuff. So they can get your other information and passwords that way.