It is a fact of the internet that every click, every view and every sign-up is recorded somewhere.
  We came across all sorts of interesting stats about social media sites and users, so we've collated the best of them in this bumper fact list.
  For curious reasons, these represents a series of numbers that boggle the mind, users counted in tens and hundreds of millions and time in millions and billions of hours.
  For marketers, knowing the statics behind the social networks can inform strategy and spend, allowing focused targeting of users.

                            USER STATS...

4chan: 27.7 million users

Airbnb: 150 million users

Facebook: 2.072 billion users

Flickr: 90 million users

Google+ : 111 million users

Instagram: 800 million users

LinkedIn: 500 million users

Myspace: 15 million users

Periscope: 10 million users

Pinterest: 200 million users

Reddit: 234 million users

Snapchat: 178 million daily users

Twitter: 330 million users

Wechat: 1.12 billion users

Weibo: 600 million users

WhatsApp: 900 million users

YouTube: 1.5 billion