Airbnb: 50 million

Facebook: 1.65 billion

Flickr: 112 million

Google+: 300 million

Instagram: 400 million

LinkedIn: 300 million

MySpace: 50.6 million

Pinterest: 100 million

Snapchat: 100 million

Twitter: 320 million

Wechat: 1.12 billion

Weibo: 600 million

WhatsApp: 900 million

Youtube: Over 1 billion