Then came 2018, with the greatest impact on the laboriously collected data in the history of data-driven marketing. The alleged evil bears the name GDPR (General Data Protection Regulation). The majority of marketers had to deal with a feeling of uncertainty, which slowed down long overdue transformation projects or even forced them to superficially comply with the new restrictions, often at the expense of the properly registered recipients of personalized newsletters. It was not uncommon for a hastily sent request for a new consent to result in the partial or total loss of the recipient database. There was a widespread feeling that all the data collected so far was now being used as a boomerang.