http://ift.tt/2oRKmug Duolingo launches paid subscriptions as it struggles to monetize its service http://ift.tt/2pLPTkH
Friday, April 21, 2017
Duolingo launches paid subscriptions as it struggles to monetize its service
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startups
http://ift.tt/2oRKmug Duolingo launches paid subscriptions as it struggles to monetize its service http://ift.tt/2pLPTkH
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