I've only used Jeblue before, which allows for family pooling. I am about to book delta flights so am considering getting the amex delta gold card, with a 40k welcome bonus and 3x skymiles per $1 spend on delta.

I understand my wife and each of my 3 kids will get 5x miles for the ticket cost of flight, and those points will be linked to them, and can only be used for flights in their name.

My question is...what about the 40k welcome bonus, and the additional 3x per 1$ from the amex card. Can that only be used for the card holder, or can it be used for the kids tickets? Can it be combined with each kids base skymiles? Trying not to end up with the cardholder have a lot of points, and everyone else having small unusable amounts. If that's the case, I may just stick with another card for the flexibility.

Thanks for your help!!