Nvidia has significantly reduced the financial guarantees it is willing to provide for OpenAI's massive data center infrastructure, a project estimated to cost up to $500 billion. This scaled-back deal highlights the chipmaker's evolving role as a financier for the AI industry, effectively acting as a bank to fund its own hardware sales. However, investors and industry observers warn of the immense capital and environmental risks involved if these AI companies fail to generate the profits required to justify such colossal investments.