Actually except Baidu vs. Google, you can not think out other examples the government made big impact. The other competitions in Internet between Yahoo vs. Sina, eBay/Amazon vs. Taobao/JD, MSN messenger vs. QQ, are all good counter-examples.
Foreign companies can not adapt to needs from local users. That is the key. The market is the king to decide the fates of Internet companies and products in China generally. Others are important but not critical.