Originally Posted by
LY777
BUT you can't transfer miles from your children, for example, unless you pay for a high fee
Why are you saying that?
You can pool the miles for free between all holders of extra Amex cards, including your children provided they are 18 or older (so yes, if you are looking for one difference with BAEC family accounts, minors are excluded).
When you say, "for example", did you have other examples in mind where you thought you cannot pool the miles between Amex cards holders?