Yes, the users 'pay' for the services they value by providing data. But if data has inherent value (like oil) then transaction should be taxed somehow. Then sales (the monetization of the data) as tax base or allocation criterion could be a way of doing that?https://twitter.com/MForstater/status/953901680164294656 …
I think u tax the ad revenues because that's the cashflow - but it's only part of the value created