Creating demand through marketing is terribly inefficient. Imagine the ability to produce and commoditize whales[1]. As long as the cost of neuro-implantation is less than the return on investment the incentive to maximize neuro-implantation exists.

Of course, just like many ad-free experiences today, it's always the consumer's choice whether they want to pay to not be manipulated.

[1] https://www.brandunited.com/article/whales-in-customer-base/