OpenAI is starting to make a significant amount of money, possibly in the hundreds of millions of dollars. This indicates that they are reaching a point where they can self-finance. Microsoft's purchase of a 49% stake in OpenAI aligns with this move, as OpenAI wants to retain control of their company. They believe this could be their last fund raise, as they are bringing in enough money to self-fund their next generation of AI systems. OpenAI currently has a monopoly in the market, as there are no other APIs available for technologies like GPT. They receive revenue from startups that use their services, and they are projected to make billions in the near future.