You have to log on via a specific website address and there are a bunch of references to how it is only for people living in Qatar.
http://www.gulf-times.com/qatar/178/details/361047/qatar-airways-launche...

I get endless amounts of spam from Qatar Airways beckoning me to rent cars in countries I'll never visit and stay in expensive hotels I can't afford. I'm certainly not going to inflict that on my friends. Why can't I just enter the competition and win the tickets myself?!