blog.kissmetrics.com/convert-visitors-into-subscribers/
thenextweb.com/media/2012/05/18/the-financial-tim...ibers-than-it-sells-print-copies-by-end-of-year/
marketingprofs.com/articles/2012/7971/subscribers...shift-to-subscription-services-changes-marketing
hypebot.com/hypebot/2012/05/rdio-plans-to-compensate-artists-for-bringing-in-subscribers.html
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