[tomudding]

> Can anyone tell me which other "large" projects have this capability?

I'd say that all popular apps (Android/iOS) have such functionality. Most will probably use it for A/B testing, but technically you could change anything you'd like with it.

Apart from the companies creating their own implementations [0], popular services I have seen include Optimizely [1] and Firebase Remote Config [2].

[0]: https://engineering.fb.com/2014/01/09/android/airlock-facebo...

[1]: https://www.optimizely.com/products/intelligence/full-stack-...

[2]: https://firebase.google.com/docs/remote-config/