I happen to be booked on one of the cruises that will offer free excursions. I was most likely planning on organizing my own, but will certainly now take advantage of this offer. I am not expecting the overnight off the ship to be included in the freebies.
Some of you may remember that when the Song was in Asia (maybe Africa as well) the excursions were complementary (nothing that involved air or hotel off the ship). They were just like I had come to expect of RSSC, well run and never crowded. What I particularly liked about having the excursions included was that I chose what I really wanted to do as price was not a factor.
To answer Marc's question, I'll use the Amex credit for Spa or an onboard booking.