Something of a pointless refusal.
The objectors seem to think that without the mighty power of Google, China's censorship efforts will be impaired. Not true: China already has a very popular, fully censored domestic search engine, Baidu. It also runs advertising.
Short of some form of Grand Scheme involving decentralised self-organising networks of Android phones flooding China, Google's actions aren't going to affect China's censorship policy much either way. Either people in China will be using a censored Google, or a censored Baidu.
Censored Google is probably better. At least Google is likely to do the minimum censoring and tracking they are required by law in China, while domesticly-owned companies go beyond that.