Royal Up offers don't depend on category booked (though the offers are different depending on what category you start with).
If available, it should be sometime inside final payment.
The app should list that - look at the next 3 day sailing. I have not heard of a concierge getting ice skating session tickets but maybe they can somehow.
Looks like the same editor puts out both the GGG and F&F fliers - same format and seeming errors (blanks in the spot where the price is supposed to be). And there are some deals on it, like the 9/29 Mariner sailing.
No, it's likely a grounding issue. That unit and perhaps others are looking for a land-based grounding system to operate - the shipboard system is different. @chengkp75 can provide a better explanation if needed.