I have traveled in the Pacific region...a LOT. I have never been asked for the credit card. I may have a problem in my next trip to Lembeh and West Papua. Another person purchased my ticket, but I will not be traveling with them as they are only joining the second half of the trip. Do you envision a problem with that?
You might. When i book on silkair/singapore airlines, there's always a check box that asks if the credit card owner is travelling on the trip. It really is quite troublesome. At the check in counter, usually it involves calling the credit card company to cancel the previous charge (even if the bill has been paid) and charging the cost of the ticket to the new credit card.