Because advertisers will use Gemini instead.

Advertisers already have established relationships and business processes with Google account managers.

Why bother starting from scratch with a new account manager at OpenAI? Will OpenAI even last?

At least Google has been around a while. Seems like a safer investment from point of view of advertiser.

I honestly don’t think open ai has the maturity or discipline for long-term viability, but their operating expenses for a week would eclipse the annual payroll required to hire a large corporate infrastructure that may be the best shot they have at transitioning from a company operating on hope and buzz to one that actually makes a few bucks. I’ll eat my hat if they become the next Google, but they didn’t pull the playbook out of thin air.