If I understand the situation and laws correctly, there is the Omnibus Directive here in the EU to prevent cases like this (or at least make less common).
> An Omnibus Price is the lowest price that a consumer has been able to buy a specific product for during the past 30 days. As an EU business, it is important to ensure that you display Omnibus Prices on your product pages clearly (...) - https://www.sniffie.io/pricing-vocabulary/omnibus-price/
> An Omnibus Price is the lowest price that a consumer has been able to buy a specific product for during the past 30 days. As an EU business, it is important to ensure that you display Omnibus Prices on your product pages clearly (...) - https://www.sniffie.io/pricing-vocabulary/omnibus-price/