Probably better just to wait next month until they start the redemption period for the S5, since they are lightner.
Yes, lighter but air freight will be also expensive for them, maybe around 2000-2500USD for 100TH S5.
Well, let's say there are 50 miners.
If someone is in china they can easily host it there.
If someone wnated to return it, I could expect the price would be around $4000 (including pilot) for a daily rental of an aircraft (since second-hand large aircraft are usually sold at $160000).
If there are around 50 miners, each of these could sell on for around $200 heach.
Making a total of over $10000 for the miners (not worth it!).