Revenue puts a ceiling on profit. You can't sell at a loss and make it up in volume, but you also can't make more profits than revenue.

Right now there are 360,000 blue check marks on Twitter. If I spot you the first million blue checkmarks and the first 100,000 business profiles, that's only $144M of revenue per year. Even if that is 90% profit, $130M / year profit on a $50B investment is not particularly brag-worthy.

I assume Musk needs Twitter to be profitable, but as somebody trying to sell cars, and satellites and big solar projects and space launches around the world, the platform can help him in other ways too.