"The new regulation will cap interchange fees at 0.2% of the transaction value for Visa and MasterCard consumer debit cards and at 0.3% for Visa and MasterCard consumer credit cards effective as of December 2015." https://www.adyen.com/blog/eu-interchange-fees-cap
That put a lot of credit card schemes (get fly miles or points or cashback for each purchase) in trouble and they had to change their offers. My credit card company wrote back then I can now only earn status miles with their silver card now, at 99 Euro/year cost.
