Because it's injected into a previously working product - even if it makes it worse - and automatically injects its ideas. That counts as "somebody using it".

Because it's bundled with other products that do provide value, and that counts as "someone using it".

Because some middle manager has declared that I must add AI to my workflow ... somehow. Whatever, if they want to pay me to accomplish less than usual, that's not my problem.

Because it's a cool new toy to play around with a bit.

Because surely all these people saying "AI is useful now" aren't just lying shills, so we'd better investigate their claims again ... nope, still terminally broken.