Nice one
Although ..... not
quite a cigar*. I do believe we had a case a while back of someone getting a similar move - BUT on their very first EK flight and so, as a mere blue.
Sadly, after hitting the jackpot that day, they didn't get a single upgrade during their next 100 flights.
(actually ....I made up the last sentence)
*no cigar in ANY class these days of course .....