Wirelessly posted (BlackBerry: BlackBerry8530/5.0.0.1030 Profile/MIDP-2.1 Configuration/CLDC-1.1 VendorID/417)
"If you want SAS points, you need to put in your FF# (otherwise, how will they know which of their millions of account holders will get them?)"
From the terms and conditions of the offer:
"Only valid for Avis rentals paid with a SAS EuroBonus World MasterCard"
Presumably each individual SAS EuroBonus MasterCard is already associated with a particular EuroBonus account. So it might be possible for one to earn Club Carlson points from the rental itself, and the bonus points from charging the rental to the EuroBonus MasterCard. That's what the OP wants to know.