Seeing Elon Musk, it could be a plausible move to screw financing for OpenAI.

Without financing OpenAI may not have enough runway to survive. That would create a bigger market for x.AI, and also as a bonus act as a personal revenge on OpenAI.

https://openai.com/index/openai-elon-musk/

Musk is clearly referring on their lack of funds at the end of this message.