Deliberate choice by the company trying to take your data. They don't have to do that, they want you to be pissed off with the wrong people.
The real [Deutsche] "Gesellschaft für Datenschutz" seems to be: https://www.gdd.de
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Before edit:
Given this is one of the organisations who help give governments draft laws by advising them, and whose purpose is to help its members obey those laws, that would be rather self-defeating.
And given the web design apparent on the following page, I think this is much more easily explained as "bad web design": https://dg-datenschutz.de/imprint/
If given an active choice nobody* would ever go "yes I want you to sell my data to your 1,414 carefully selected partners". Maybe they want personalisation when they sign up for an account, but you ask them that at signup time, not the first time they land on your page.
* where nobody < 1%