There appears to be a merger market kicking off inside European-focused social networks. Xing, the Germany-based European business social network which resembles LinkedIn, has now bought Turkish business social network Cember.net, for about €4.36 million (£3.25 million), to be paid in stages. Cember has some 280,000 free and paying member and was “slightly profitable” last year. Xing acquired the Spanish networks eConozco and Neurona in 2007.