the difference is that they do 'know' of every package coming in, they know nothing about what people download
We can spin this even further, when I buy a car, either the whole thing was imported or parts were imported and taxed at that time, all of that is relatively easy to track. How much of, say, MS Word was developed in the US, vs India, and how do you tax that?
I am not, Trump might very well post another deranged tweet about this, I am talking about the implementation of the deranged intent. Just like the movie tweet, there will be no follow-up (and that one even is theoretically possible to enforce, it just is really stupid and harmful to do so)