Comment by youngtaff

There's a huge piece of information missing from that article and much of the reporting of Amazon's decision

Visa have put up UK-EU interchange fees (as post Brexit they're not covered by the cap)

But it affects Amazon because when you buy something from Amazon UK, you're billed by Amazon Luxembourg and Amazon UK then fulfil

Amazon's tax avoidance strategy is part of the reason the charge has increased for them.

If they billed from the UK it wouldn't affect them