Exactly, the whole point of WhatsApp and why the founders made it is there were billions of people with nothing but overpriced SMS, and they were all used to using phones. They did everything right.Quite simple, many people aren't (or weren't) on Facebook when WhatsApp reached it's critical mass (which is essential to even have a chance as a "platform"). Since you can use it with just a phone number and nothing else it is easy to set up and just works.
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Well if everyone were starting fresh now, WhatsApp is pointless. It's a good service but is just worse than FB Messenger.I think you misunderstood my question to szw-mapple fan. I know what both apps are and who their primary audiences are. My question was why would someone not see the point of Whatsapp. As you pointed out, they cater to different audiences through different means. FBM is the #1 messenger app in the US and WhatsApp is the #1 in the world. As to advantage... they're both monstrous so I don't think it matters that much.