Oth: it's a calibration process. If the regulations are to onerous, we can loosen them again, or companies will spring up that make compliance easy. https://www.chargebee.com/ solves the European VAT nightmare for example, until we have harmonization on that front. Is it inefficient? Depends on your model of the world: I'd rather pay a bit more for my goods/services and know that my privacy and data autonomy are preserved, and some people might argue that having the freedom of fiscal policy in differing regions is worth paying chargebee their premium. And if we figure out a way to slide into a better pareto point, cool.

>I realize generality and such get in the way of this, but... I think it would have been better if this move specifically targeted the 100 biggest companies, who have the scale an resources to actually use all this tracking data.

then they'd outsource it, hide it, whatever. See: tax laws. Law is like exercise, you can't specifically target abdominal fat,nor can you specifically target Fortune100 excesses