But there are lots of sites and companies that are not alive because the government doesn't allow it. Want to start a video site? sorry, that is regulated. anything to do with online payments? need a license. social network or any communication website. Yup, need a license.
As a foreigner here in China a blocked or crippled internet is zero effect or relevance on daily life. We just VPN out to the "real" Internet daily.
But if SOPA is approved, there may be no more real internet. Not because facebook or big sites will be blocked however. It will be because the government will have the ability to cut innovation and entrepreneurship off by seizing sites at will.
China doesn't allow social networking sites. What will America and Co. not like and allow?