Digital IPO Sinks Facebook In Customer Loyalty Study The list of casualties of Facebook’s staggering initial public offering now includes Facebook’s position on the Brand Keys Customer Loyalty Engagement Index, as it fell to fifth place in the social networking category, after holding the top spot in February.By David Cohen|June 1, 2012Share By David Cohen|June 1, 2012Share Pages: 1 2 Adweek Adweek