I guess its not impossible that you could be upgraded to a higher grade inside cabin or even an outside cabin, its never happened to me but you never know it depends how fully booked your cruise is - have you had a look.
About the same as winning the lotter.
No, its never happened to us either, in 15 cruises with a number of different cruise lines!!!But dont give up hope, miracles(may!) still happen.
Royal Caribbean - Ovation of the Seas - 08 Mar 18 - 33nts
UK : Sydney : Milford Sound : Doubtful Sound : Dusky Sound : Dunedin : Wellington : Napier : Picton : Sydney : Brisbane : Darwin : Kuala Lumpur : Singapore : UK
Now from £3099pp
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P&O Cruises - Oceana - 20 Nov 17 - 9nts
Southampton : La Coruna (Spain) : Seville (Cadiz) : Gibraltar : Lisbon : Southapton
Now from £599pp
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MSC Cruises - MSC Preziosa - 27 Sep 17 - 7nts
Southampton : Bruges : Amsterdam : Hamburg : Paris (Le Havre) : Southampton
Now from £399pp Was £799pp
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