Generative AI has rapidly gained traction, with OpenAI's ChatGPT leading the charge as the most popular standalone chatbot. Launched in November 2022, it now boasts 800 million users weekly. ChatGPT operates on a Generative Pre-trained Transformer model, which allows it to generate new data based on user input. OpenAI monetizes ChatGPT through subscriptions, an enterprise product, and a new eCommerce initiative called Instant Checkout, where retailers like Etsy and Walmart pay a percentage for transactions facilitated via the chatbot. Despite its popularity, OpenAI faces significant financial challenges. The company reported an $8 billion loss in the first half of 2025 and has committed to $1.4 trillion in infrastructure spending over the next eight years. To support its high valuation, projected at $1 trillion, OpenAI needs to boost revenue growth, especially considering that only 5% of ChatGPT users pay for subscriptions. The article argues that while the affiliate-like eCommerce model has potential, it may not be the best long-term strategy. Instead, personalized advertising could provide a more scalable and consumer-aligned revenue model. The author believes personalized advertising will become the primary monetization approach for ChatGPT, as it aligns better with user expectations and allows for more effective targeting. Unlike traditional search engines, where users want quick answers, chatbot users seek in-depth insights, making nuanced advertising integration essential. The article identifies flawed assumptions that equate chatbots with search engines, particularly the idea that ad targeting should rely solely on in-chat context. It emphasizes that chatbots can leverage broader behavioral data for more effective personalized advertising.