Question: How does Draft Experiment Distribution work exactly? It seems that the devices that get the drafts are the ones the can be paired and not only the actually paired ones.
Answer: There are a lot of factors that go into that, however, if you haven't turned link only pairing on, Xcode builds and ad hoc builds will show up in that list, and finally, if you set liveUpdate to true.
Additionally, Enterprise and Production builds will not show up on that list unless they have explicitly been paired either when they were adhoc or through link pairing
It is expected behavior that the draft experiment delivery is meant to be sent to device that can be paired not devices that are actually paired.