Is that a real question? I mean, that's how the business world works. Siri isn't going to enable purchasing from their service, if they aren't going to see a dime from it. That's insane!! Perhaps it'll only be a couple cents, but they'll get something from it.
It's not like me putting a link on my website, because I like something so much I want to share it. This is a business doing it and businesses try not to do things for free. Even if it looks free on the surface, you can pretty much assume their getting money from somewhere out of it.
Market Data 
Markets 
AI
