The Problem with WeChat, et al.

WeChat is not a preferred way of contacting me. Use these instead.

WeChat is a instant messaging program by the Chinese technology giant Tencent. It is insanely popular in Mainland China.

I do not use WeChat when applicable for the following reasons:

• WeChat's client program is nonfree software.
• Many of WeChat's features are Service as a Software Substitute.
• WeChat's servers are nonfree; the service is centralized.
• Tencent suspends WeChat accounts for sending "politically sensitive chats".
• Information collected by WeChat is given to the police of the PRC without court warrants.
• etc.

Similar problems are present in other popular Instant Messaging services such as WhatsApp, Discord, Tencent QQ, etc.