This is definitely a positive outcome for steem, to be traded for commodities, and they do have a refer and earn scheme as well.

Refer your friend to Keyi Store. Once he accepts your invitation and shops on our website, you will receive a $5 coupon. Invite as many friends you like, all coupons will be accumulated into one. You can use the coupon the get a flat discount on our store or invite until it reaches $50 and then you can order anything of that value for free. Please register at our site before referring for convience.