spintank social media management e pr julian dufoulon e influence social media marketing nicolas vanbremeersch justin poncet plateforme communautaire france 2010 etude opinionway sondage #lemonde #lemondefr #queffelec #a_f_k #designmedia designinteractif a_f_k kinect lab212 beatrice lartigue mrkalia letank paris bastille le tank coworking numerique digital community management community engagement user-generated content brand participatif communicaition corporate entreprise participation spintank opinionway etude sondage france 2010
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