That is one of the regulations that should be applied to adtech companies: Adtech companies should be required to offer a paid version of all their products with a price that covers the costs of producing the service (including a decent profit margin but not including tracking/adtech components of the free version) but with strong guarantees that customers [1] opting to pay are not tracked, not shown ads and their data is in no other way monetized or sold to third parties.

[1] as opposed to products...