I'm more interested in how they got 14 million users with only 4-5 people. what marketing tactics did they use? I assume those should be milked to death by now.
WhatsApp used to refresh its app by tweaking its name in early days on Appstore so that it appears new in the algorithm to be recommended. I guess that practice is now prohibited on both the stores.
Luck.
luck is being milked to death, but it only favors the living