How can I prevent a given device from sending “false” installation number and DAU values?
There isn’t a way currently, but it something we are looking into. As you’ve probably noticed, a reinstall looks like a new user to us, and reinstall can happen often during development.
Indeed!
Now, Unity Ads can target specific devices with the device’s advertising ID, to send them test ads only, so maybe this function could be “recycled” for the time being because such devices are obviously the same, not real customer devices.