OpenAI says its ad business has hit $1B in annualized revenue run rate and is expanding globally, as it touts its "diversified business model" ahead of an IPO (Ashley Capoot/CNBC)

Ashley Capoot / CNBC: OpenAI says its ad business has hit $1B in annualized revenue run rate and is expanding globally, as it touts its “diversified business model” ahead of an IPO — OpenAI on Monday announced that its advertising business has hit $1 billion in annualized revenue run rate …