I am not earning coins

Good afternoon, I have an account with 2 or 3 chars at the maximum level, but I never won a coin on the site, is there a problem with it? I know that you need 1000 points of archievments and I already have in two heroes a hunter in the icecrown and a hunter in the mists of pandaria, they would be able to help me, I want to be a donor but I am afraid my account has some kind of problem.

It needs to be unique achievement points, so if you have 2 lvl 80 achievements only 1 will count.