I've just made 8 dinner resies each for a party of 8 for our visit 2/02-2/17. All of them for the top restaurants on Aurba and I was never asked for a credit card authorization for any reason. I have been asked to reconfirm once on the island which is reasonable. The time I was ever asked to complete a CC authorization with a no show policy of $50 per person was for Mesa Grill in NYC.
To your question - "what kind of answer is that?". It is a rude and totally disrespectful answer and I would not give this restaurant any business.