OK, as I suspected, but you never know. That's why I posted here to see if anyone else had done this.

Quite often I make the reservation under my husbands card number and I do receive Platinum benefits for the stay. What we don't get then are points for the stay because the credit card is my name, not his. That's what they have told me but I have never actually looked at his account to see if it's true. Next time I do it, I'll check after and post to this thread.