It's unclear how OpenAI intends to quadruple its revenue? They just doubled their active user count in only a few weeks and their Pro subscription was a new offering as of January. I'd be surprised if their revenue wasn't at least four times larger by the end of this year.
I do not know one person who has bought a pro plan. And especially now where Gemini 2.5 Pro Experimental is leaps and bounds better than their pro plan models.