What they actually play
Bans read from 59 drafts. A hero nobody is allowed to have is banned often and picked rarely, which picks alone never showed.
Picks are counted over 63 games, and that is what the pick %T is a share of. Bans are counted over the 59 of them we hold a draft for, because a game with no draft is not evidence that nobody banned a hero. The two denominators meet once every draft has been read.