I was able to register succesfully and it already show that promotion in registered promotions of my IB Plus profile.
I guess it'll be the same as all other OW carriers, except AA/BA, where you earn 0,3 Avios per mile in all economy fares except full fare economy (Y,B,H) where you get 1 Avio per mile and business is 1,25 Avios per mile.