[zamnos]

But all that information goes to the large platform vendors (eg DoorDash, Uber Eats) if you use their app instead. What makes the business-specific app worse in this regard? At least with the business-specific app, there's one less middle man involved.

[jacquesm]

Maybe. Or maybe they just see that as their additional source of revenue. For instance there are third party libraries that you get paid to include in your app which leak all kinds of data about you. Easy money for the app vendor.

[rprospero]

Again, I would assume that UberEats and DoorDash have been paid to install all of those third party libraries, so it still feels like a lateral move to install my local pizza app instead. The only argument I see at the moment against the belief that the major apps have installed these trackers is that they feel they can negotiate for more money when they sell my personal information, but I don't see a scenario where I'm ordering on a phone and my personal information isn't being tracked and sold.