Cruise line Godmothers - What do they actually do?

At the risk of committing blasphemy to certain cruisers this question has been bugging me for awhile now........
What do the Godmothers of cruise ships actually do?
As far as I can see they turn up for the launch party, maybe the inaugural cruise and then that's it.
Then they're never heard from again!

A sneak preview for next year....

Well, it’s been an amazing year with lots of new ship launches to enjoy, from NCL’s Epic right through to Cunard’s QE, there’s been something for everyone and there’s still one more to come, (the Allure of the Seas), towards the end of this year. But today, for your eyes only I’m going to be taking a sneak peak at some of the cruise ship launches coming up for next year.