I know that sometimes when a student reaches achieves the black belt ranking in Brazilian jiu-jitsu, some schools stop charging them to come to the school. I suppose the reasoning is that they have paid enough over the years already and now their presence is valuable enough to the school that they should not have to pay for classes anymore. Maybe it is also to minimize the desire for those new black belts to go to another school or to start their own! Who knows.
In any case, what is it like where you train? Let us know in the poll or in the comments to this post.