IT WEB AFRICA - Sep 16 - According to research firms World Wide Worx and Fuseware, there are now 3.8M LinkedIn users in South Africa, up 40% YOY. Growth of LinkedIn in SA comes amid a sluggish economy. Other notable rising social networks include Facebook with 11.8M South Africans. 9.2M of them access Facebook on their mobiles. Local social network Mxit is down to 4.9M users from 6.5M one year ago.