Recently, MessageMe announced it had grown to 1 million users in a little over a week’s time. The revelation captured the attention of envious app makers throughout Silicon Valley, all of whom are searching for the secrets of customer acquisition like it’s the fountain of youth. “Growth hacking” has become the latest buzzword, as investors like Paul Graham profess it’s functionally that matters.
Clearly, everyone wants growth. To someone creating a new technology, nothing feels better than people actually using what you’ve built and telling their friends. Growth feels validating. It tells everyone the company is doing things right. At least that’s what we want to believe.
Good Growth, Bad Growth
Sometimes viral loops drive growth, because the product is truly awesome, while in other cases growth occurs for, well, different reasons. As an example of good growth, it’s hard to top PayPal’s viral success in the late 90s. PayPal knew that once users started sending money to each other, mostly for stuff bought on eBay, they would infect one another. The allure that someone just “sent you money” was a huge incentive to register.
PayPal nailed virality. Both sides of the transaction benefited from utilizing the platform and a classic network-effects business was born. In order for users to get what they wanted, they had to open an account and the product spread because it was useful and viral.


