Snapchat isn't just popular among teens and kids. According to Nielsen data, the app saw around eight million unique US users over the age of 18 during May. Furthermore, these weren't just one-off users. According to the same data, each user accessed the app an average of 34 times during the month of May, indicating that many users used the app more than once per day.
Of course, Snapchat won't share user numbers but instead prefers to share engagement numbers. On that front, Snapchat has seen the number of daily snaps go from around 60 million in February to around 200 million. Perhaps this wide popularity among both teens and adults explains why investors were willing to provide the company with $60 million and a valuation of $800 million, despite the company having no revenue.