What does it do with ground pins when plugged into donut/bagel? The Kickstarter diagram for donut makes it look like US ground pin has a place but the donut's plug just has an unpolarized two prong plug. Bagel diagram shows two prong universal but the video shows grounded devices being plugged in. Do the ground points just hang out in the middle of the bagel (where if it were a real bagel, cream cheese would go?)

Just curious. The specs on the diagrams show it isn't suitable for power hungry things like hair dryers or flat irons. I imagine most would probably use grounded laptop chargers?

The plug adapter definitely looks interesting for those loose European grounded sockets.