Originally Posted by
carnarvon
Transfering 250 miles costs €3.
The Amex Plat costs € 570.
Meaning that past 47,500 miles, not millions, you will be better off having such a card.
The OP asked if there was "a way" to create a family account.
This is a way to create a de facto family account. It is not free, but it works.
You don't need the Platinum card to use Share & Fly, the entry level card (35€ per year * 2) is enough, or you can also go for the Silver for 75€ which give you 2 extra cards for free.