Payback
In short: Payback is a large German bonus programme in which you collect points at partners.
In more detail: The programme started in 2000. Points can be redeemed for rewards, vouchers or money.
In Depth
Privacy
Payback collects purchase data to personalise advertising. This requires consent, which can be withdrawn. There was criticism from consumer and data protection advocates. See GDPR, tracking.
See also: GDPR (DSGVO), Tracking, Personal Data