I think ads will inevitably roll out across all tiers, even the expensive paid ones. Ad revenue isn't uniformly distributed across users, but rather heavily skewed towards the wealthiest users, exactly the users most able to purchase an ad-free experience. The users paying $20 or $200/month for premium tiers of ChatGPT are precisely the ones you don't want to exclude from generating ad revenue.
Google realized this a long time ago; there is no ad-free paid version of Google Search.
Google realized this a long time ago; there is no ad-free paid version of Google Search.