Paid for myself, as it was on holiday. I then spent 17 nights in the top bunk of a small cabin in rough seas in the Antarctic ocean - I'd rather pay extra for the flights than a cabin upgrade.
Interesting, as I preferred to do it the other way round - two lots of 14 hours of discomfort in economy on Air France, but a suite for the Antarctica cruise. I'd have loved to have upgraded the flights but even going to premium economy was over double the price (I paid £540 for the flights, and premium was something like £1200).