"all four accused of pressuring online retailers from discounting"
The EU is a bit bipolar when it come to fixing of prices. It was only a few days they were slapping a distie for importing Cisco grey-kit
https://www.theregister.co.uk/2018/07/05/distributor_bosses_had_7figure_settlement_to_cisco_for_dodgy_importing/
Which is practically the same thing, as Cisco would be rigging a higher EU price when compared to other markets.