https://finance.yahoo.com/news/uk-ico-rules-facebook-snapchat-likes-twitter-streaks-112054409.html

“Nudge” theory was developed by a Nobel Prize-winning economist and uses human psychology to encourage certain behaviours. It has been successfully used to encourage things like blood or organ donation.

READ MORE: UK's tough new internet rules are 'blunt tool'" data-reactid="19">READ MORE: UK's tough new internet rules are 'blunt tool'