You can say that about Instagram but not really WhatsApp. When FB acquired WhatsApp it was already the most popular messaging app in many countries. In Israel f

You can say that about Instagram but not really WhatsApp. When FB acquired WhatsApp it was already the most popular messaging app in many countries. In Israel for example literally every person in the country had WhatsApp on their phone by the time of the acquisition. FB acquiring WhatsApp wasn't that impressive. The impressive part was the amount of money there were willing to pay for it. As far as I know it's still not making any money so it's not even clear yet if it was worth it.