Maybe... but how much money could they possibly be saving? Quartz oscillators like the ones used in cheap digital watches are plenty accurate and completely abundant. I can't imagine they cost very much.
Maybe the issue has to do with miniaturization? If you're trying to make smaller and smaller devices, there could be an acceptable tradeoff between size and precision.
The tuning fork crystal design used in wrist watches has a parabolic temperature coefficient, which means that the clock is only really accurate at room temperature. This isn't a problem for wristwatches, because, presumably your wrist is at approximately room temperature, but it does become a problem for electronics that operate with large temperature swings. (like the inside of a phone or computer, for instance).
https://www.maximintegrated.com/en/app-notes/index.mvp/id/58
A simple tuning procedure could make almost all quartz clocks you own a heck of a lot better. But in many cases this is hard to do because the manufacturer never put the tuning components (a variable capacitor or the like) on the PCB.