> How is a $6.5B valuation justified? The hope is to make a locked-in user base and a captive audience. They are probably hoping to create various sorts of "a

> How is a $6.5B valuation justified? The hope is to make a locked-in user base and a captive audience. They are probably hoping to create various sorts of "attachments" between users and their "achievements" to drip revenue from users through either premium accounts or ads.