what SNS do you usually use? 你们平时利用哪个SNS?

several years ago,The most popular SNS in Japan WAS MIXI,but since Facebook appeared in Japan,many Japanese people started using Facebook and twitter.
我们日本人以前都用MIXI,但facebook在日本出现后，那里人越来越少，现在很多人用face book 和twitter。

<em>(as MIXI is no longer popular, so it WAS instead of it IS)</em>

I know many Chinese like to use Chinese original SNS like QQspace,Weibo and Ren-Ren.
我知道很多中国人喜欢用QQ空间，微博，人人网等中国特有的SNS（能翻墙的人也用facebook和twitter）

what SNS DO the People in your country use? what about li(n)kedin?
那你们国家用哪个SNS的人比较多？linkedin怎么样？

(as the question refers to the people so the auxiliary is DO instead of ARE)

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In my country Indonesia, we have some local SNS, but I am not so familiar with them. At least I remember one from blackberry application. And here fb and twitter are most popular.

What SNS do you usually use? 你们平时利用哪个SNS?

Several years ago, the most popular SNS in Japan is was MIXI, but since Facebook appeared in Japan, many Japanese people have started using Facebook and twitter.
我们日本人以前都用MIXI,但facebook在日本出现后，那里人越来越少，现在很多人用face book 和twitter。

I know many Chinese like to use the original Chinese original SNS like QQspace,Weibo, and Ren-Ren.
我知道很多中国人喜欢用QQ空间，微博，人人网等中国特有的SNS（能翻墙的人也用facebook和twitter）

What SNS are people who living in your country ordinarily using? What about linkedin?
那你们国家用哪个SNS的人比较多？linkedin怎么样？

The most popular is facebook, twitter, and linkedin; Facebook, the most.