It may come as a surprise to some, but making money is not important. That's why so many people lost their shirts shorting the 'unprofitable' Amazon.com
Rather, it's the the demonstrated ability to make money, which is more important. Should the time come to turn on the advertising money printing press, Pinterest and Snapchat, like Facebook, should have no difficulty making money. There's already a huge line of advertisers ready to plow hundreds of millions of dollars into Pinterest ads. Investors are patient, knowing that Pinterest will start printing money when the time is right. But right now, Pinterest is still building the userbase and perfecting their ad platform. Like Facebook, Pinterest's profit margins will be extremely high, and it would not surprise me if this company is worth $50 billion soon. But right now, Pinterest, like many web successful web 2.0 companies, is more interested in taking its time to build positive user and advertiser experience, than milking every user for every last dime.