It's due to the fact that app developers usually install their app many times. And, it's possible to watch for those app installs in Android.
Also, implementing an app that takes advantage of this requires ZERO permissions.
This app finds those kind of apps and allows you to stop them.
1. Open the app and press "Scan all apps". You'll see the list of apps with the capability to track you as an app developer.
2. Get a notification when you install an app with the capability to track you as an app developer.
This app also provides a shortcut to the app's system info page and can show you the AndroidManifest.xml file. On the system info page, the "force close" button will prevent apps from receiving any broadcasts.
Learn more in my blog post: http://blog.anonsage.com/2016/03/privacy-programmatically-identifying-dev-device.html or in the GitHub repo: https://github.com/danialgoodwin/identify-dev-device