You would think the effect was the opposite. I think this is worse for OpenAI.
So far, the circular financing from Nvidia has been peanuts for the company. It's roughly equal to giving 5% discount on hardware, not a big deal when the profit margin is 70%. Trying to prop up new neoclouds and competition is a good idea.
As I understand it, the OpenAI investment was much bigger effective discount but still safe because Nvidia invests gradually in installments only when OpenAI invests in data centers: tit for tat. Maybe OpenAI wanted to get the money now and invest it later, as they seem to be running out of cash.