I'm not sure, there was a ban screen that showed up, saying that I was using unofficial software to log into my account, and required a self-service unblock process to be completed, which included getting a number of WeChat users to verify/vouch for my account.
The specific reason given by WeChat was that I was using an Android emulator (such as Andy or Youwave) and was sent to this page[0]
If it's sandboxed then it can track the user less, they claim it's anti-spam but anti-spam can be done without such extreme measures. Same problem with spyware Snapchat.
