Hallo,
As said - Google bought Mastercard-Data to analyse and track retail-sales…
Seldom said is, that there is an Opt-Out for Mastercards Data-Collection (so they claim):
https://www.mastercard.us/en-us/about-mastercard/what-we-do/privacy/data-analytics-opt-out.html
One needs only to enter the card-number and the captcha…
Sadly enough one needs such a page - GDPR is perfectly clear that these kind of “intrusions” must be Opt-In…