In the iOS games we made, we opted out explicitly. The games weren't ones that people would quit and relaunch with great frequency, so it made sense to just no

In the iOS games we made, we opted out explicitly. The games weren't ones that people would quit and relaunch with great frequency, so it made sense to just not bother. By the time they relaunched it, it probably would have been terminated in the meantime by the OS anyway, just due to normal use of other apps.