https://brain-active.com/wp-content/uploads/1-Fotolia_104113445_Subscription_Monthly_XL.jpg4311500Sonja Welzelhttps://brain-active.com/wp-content/uploads/logo-brain-active-unternehmerberatung.pngSonja Welzel2018-02-20 20:52:002021-12-25 09:30:43Kundenbindung über den Tod hinaus