“In 2009, the Twitter homepage attempted to boost motivation. But by 2012, Twitter had discovered that no matter how much users knew about the service, driving them to open an account and start following people resulted in much higher engagement.” — Nir Eyal Copy Share Image
“in its early days, Twitter discovered that once new users followed 30 other members, they hit a tipping point which dramatically increased the odds they would keep using the site.[cxxx]” — Nir Eyal Copy Share Image