Some social out, some social in

Since 28 january 2019: 

• all "Learni.st" blocks, and the social link itself, have been deleted, because Learni.St has been closed
• all "Flavors.me" blocks, and the social link itself, have been deleted, because Flavors.Me has been closed
• we added a new social, Mix.Com - it replaced Stumbleupon.com

In a short time, all remaining "stumpleupon"  blocks will also be deleted. We suggest you to review all your Walls!