CIAM (Customer Identity and Access Management) was once largely about managing employee access to company systems, but it’s increasingly applied to consumer log-ins and identities as well.  This creates an overlap with the identity management systems more traditionally used for customer data.  The expanded market helps to explain why private investor Thoma Bravo just paid $2.8 billion for CIAM vendor Ping Identity, a 60% premium of its most recent stock price and just under 10x revenue.