What is T1, T2, T3 pro player

First of all a pro is a person whos main income is from the game, so if you dont make enough money to live from it. So based on that. A tier 3 pro is someone that has a really good chance to qual grands( like 70%) a t2 is someone that has a preatty good chance of geting top 10 in grands and T1 has a chance of wining grands( like people would predict them to win). Everyone else is a T4. Also this is more or less ment for the big regions