They'd have to have an iron will to not do what every other leading platform has done, which is to:

- Gradually "make the line go up" by ramping up ad volume until the product is terrible (thereby ruining Apple's reputation among the 50-90% of users who aren't paying the ad-free prices).

- Periodically nerfing the premium ad-free tiers and putting ads into tiers that were previously ad-free.

- Purposefully making the lower tiers worse and worse in order to squeeze out marginal increases in conversion rates to the premium tiers.