“WeChat, the mobile messaging service from China-based Tencent, is quickly stealing market share from its chief competitor, Sina’s Weibo microblog.”
I use both of these and I don’t even think they’re competing services. Sorry. WeChat is for mobile chatting, Weibo is a Microblog.Facebook is so much bigger than those two. Facebook has over a billion active users, and a development platform and an ad platform.
Ian's Business & Tech Blog 
“WeChat, the mobile messaging service from China-based Tencent, is quickly stealing market share from its chief competitor, Sina’s Weibo microblog.”
I use both of these and I don’t even think they’re competing services. Sorry. WeChat is for mobile chatting, Weibo is a Microblog.Facebook is so much bigger than those two. Facebook has over a billion active users, and a development platform and an ad platform.