It's quite surprising that none of them Desktop leaders were able to leverage their network effect to move to Mobile. Through it's important to note that the mobile leaders today bootstrapped off the phone book.
Facebook messenger was quite something through. They bundled messenging into the Facebook app to get the network effect, then use the network effect to get people to install a separate messenger app.
they also now make it impossible (or at least very hard) to use messenger on a phone without installing their app. I rarely use fb except for marketplace and was meeting up with someone, i tried to use a browser like you can on a computer and nope had to install the app
Facebook messenger was quite something through. They bundled messenging into the Facebook app to get the network effect, then use the network effect to get people to install a separate messenger app.