Amazon sold all e books from Luxembourg to UK customers, charging them 3% VAT. When calculating royalties for publishers though, their contracts stipulated the 20% VAT rate would be used to reduce royalties. According to The Guardian, some received just 10% of the purchase price, similar to what Audible(also Amazon owned) is being accused of. https://www.theguardian.com/technology/2012/oct/21/amazon-fo...
Uber also sold UK journeys to UK customers but put the fare calculation taximeter in a server in another country to avoid the 20% VAT. I believe they actually won that case as in the EU, VAT is calculated by the seller using their country's laws regardless of the buyer's country's VAT rates and laws.