WhatsApp was initially released as a free app, but now is gradually phasing into a subscription app, charging 99 cents per year. The app has stayed clear of advertisements. "We do have a manifesto opposing advertising," Koum said in an interview with allthingsd... see more: http://www.gizbot.com/apps-software/whatsapp-ceo-we-have-bigger-user-base-than-twitter-011730.html
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