Finally... I came with the same question as you mentioned.
I already search to find a link or menu that contain referral information so I also can add some of my friend to this site.
Unfortunately, I can not. there is no referral system in Answeree.com for now.
But it is not the end of it. Probably in the future, Answeree.com might be adding more feature including referral system or mobile app version I think. Who knows it can happen someday, right?