About unintended consequences, check this article about GDPR after one year https://truthonthemarket.com/2019/05/24/gdpr-after-one-year-...
I quote a couple of sentences but there is much more there
> After the rule took effect in May, Google’s tracking software appeared on slightly more websites, Facebook’s on 7% fewer, while the smallest companies suffered a 32% drop, according to Ghostery, which develops privacy-enhancing web technology.
> The fact that Google’s compliance strategy has ended up hurting its competitors and redirecting higher demand back to its own marketplace, where it can guarantee it has user consent, has unsettled publishers and ad tech vendors