Super-simple answer: it's the law (GDPR). Kopplungsverbot. Art. 7 (4) GDPR. End of story. It says: "When assessing whether consent is freely given, utmost acco

Super-simple answer: it's the law (GDPR). Kopplungsverbot. Art. 7 (4) GDPR. End of story. It says: "When assessing whether consent is freely given, utmost account shall be taken of whether, inter alia, the performance of a contract, including the provision of a service, is conditional on consent to the processing of personal data that is not necessary for the performance of that contract. " It's like a butcher shop saying "the meat could be free if we could only reduce our cost by not caring about hygiene". Edit: oops, the methaphor doesn't work at all :-D