Sulake Corp., parent company of Habbo, one of the most heavily-trafficked, advertiser-friendly virtual worlds for teens, is privately held, so financial details about Habbo have been a bit of a black box. But the company recently served up some details: It says it brought in roughly $74 million (50 million euros) in revenue last year. And just about $60 million of it, or 80-85 percent, came from users who bought virtual goods like furniture, clothing or paid for access to the Habbo Club.

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The remaining 15-20 percent of revenue came from ads and sponsorship sales to brands like Nokia, Burger King and Paramount Pictures. Sulake also said it ended the year with an EBITDA of about $7 million (4.8 million euros) and a “positive net result.” Given the recent investments in gaming and social media startups that have virtual goods potential, it’s a look into how viable the business model is.