Booking Aegean flights via Marriott website
Was looking at some flight/hotel combinations on Marriott website and can't get my head around something.
Let's say I'm an SPG/Marriott member with an SPG Amex and I book a flight/hotel package on the Marriott website with Aegean or Star Alliance flights.
Does this mean that I will get SPG/Marriott points for the flight/hotel booking at the full (5%ish) Amex SPG rate AND still be able to input my Aegean number for the miles?
Are there any obvious downsides to booking in this way?