Inherent virality occurs when you can get value from a product only by inviting other customers. For example, if your friends don’t have Skype, the application is worthless. Apps like Snapchat and WhatsApp also fall into this category. This type of virality comes with the advantage of “network effects,” where the value of the network increases as more people get on it. That is, the more people who are on Skype, the more valuable it becomes.
