I think when you join their IKEA family (sorta like a membership thing) they automatically give you a discounted price - I applied for it and got the discount on those items I purchased during that time - not shelving items. So once you've applied for it it's automatically useable then they send your more permanent member card later on.
Wanted AM partner Vanguard, Myclones Dirge, G1 Victory Leo, e-hobby Dark scream ( the black version), e-hobby Magnificus
Parts- AM partner Basher-side guns, G1 Actionmaster Elite Windmill's blades[I][B]