Looks like it was 0.3% https://www.europeanpaymentscouncil.eu/news-insights/insight/18-months-impact-interchange-fee-regulation-european-union-cards-market htt

Looks like it was 0.3% https://www.europeanpaymentscouncil.eu/news-insights/insight/18-months-impact-interchange-fee-regulation-european-union-cards-market https://www.europeanpaymentscouncil.eu/news-insights/insight... The outcome was that they cut back on lots of loyalty programs, and not many businesses passed on the cost savings to the consumers. So sounds like limiting the fees had an adverse effect on the consumer.