Elon Musk revealed that Grok Bot's operating costs are unsustainably high relative to its revenue, responding to user complaints about rapidly depleting usage quotas on X. The admission highlights the financial strain of running large-scale AI models amid growing user demand. Separately, xAI has expanded Grok's payment options to include China UnionPay and Alipay, with new users receiving half-price subscriptions for their first month as part of a promotional strategy.