https://www.theregister.co.uk/2017/09/21/eu_might_tax_ads_on_internet_giants/

More details have emerged on the various plans being considered by European governments to force internet giants like Facebook, Google and Amazon to pay more in taxes, including a levy on internet ads and even withholding money for online transactions.

Following a letter earlier this month from the finance ministers of Europe's largest economies – that argued for a tax on turnover rather than profits – a meeting of all the European Union's 28 finance ministers last week resulted in them agreeing to push the proposal forward, but with additional options.