OG got wind of Ana because of how he performed when he played for iG, Aussies get very decent ping to Asian servers so his first pro scene breakthrough was not tough per se, he initially moved from Oz to China as a result of iG discovering him whilst he was playing from Australia. moving to EU was just the result of joining OG so that he could train with his team mates in the same gaming house.
Fact remains that if you live in a "third world" country or if you are geographically challenged as we are in SA then breaking through to top tier Dota is basically impossible.