There is no single ad platform but a dozen+ large ones across the web. Probably thousands+ if you include all the real time bidding players. In no world would all of them be honest and many would be dishonest in subtle ways. Modern capitalism is all about hiding the externalities.
The regulation people want, such as even stronger GDPR, is effectively almost a technical feasibility block on these things. Any other attempt is always going to be behind the technology curve and thus significantly less useful. Moreover politicians will add in exceptions for their top donors and friends. This is harder is regulation that doesn't get into deep weeds.
The regulation people want, such as even stronger GDPR, is effectively almost a technical feasibility block on these things. Any other attempt is always going to be behind the technology curve and thus significantly less useful. Moreover politicians will add in exceptions for their top donors and friends. This is harder is regulation that doesn't get into deep weeds.