It's the fact that as a Chinese company, if the Chinese government asked Tencent for any information, they have to provide it. Do people really think that Chinese companies are allowed to just do what they want without their Communist government interfering?
This is what Wikipedia has to say about the founder of Tencent:
"According to the official Tencent website, Ma is a deputy to the 5th Shenzhen Municipal People's Congress and serves in the 12th
National People's Congress.
[5]
Because of Tencent's dominance of the social network and instant messaging markets in China, Ma Huateng' relationship with the
Chinese Communist Party has repeatedly come under scrutiny.[
citation needed]Speaking of censorship at a tech conference in
Singapore,
Ma was quoted as saying "Lots of people think they can speak out and that they can be irresponsible. I think that's wrong […] We are a great supporter of the government in terms of the information security. We try to have a better management and control of the Internet".
[35]"
When your founder is also a member of the countries only political party, makes you wonder.