[Network effect.](<a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Network_effect" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Network_effect</a>)<p>Also due to this Wikipedia is build into a lot of things, like google search, or iOS Siri.