ChatGPT is offered by the for profit arm of the company. The relative success of that product with respect to it being profitable is irrelevant to it being for profit.
On the contrary, it is incredibly relevant whether or not the "for profit" system actually makes a profit. If ChatGPT does not make a profit, it is less "leveraging everyone's work into a massive for profit system" and more "leveraging everyone's work into a public good that is provided at or below cost, like a library".