That is, the ban is not on a town in general, but on a town for yourself or a town for your opponent.
Ban scheme: 1-1-1-2-2-2-2-2-2-1.
Purpose:
1) To diversify the ban. Currently, there are very few options, especially if you have at least minimal knowledge of the player's style. For example, recently Dubrovin and I were banning for the Degustation final, banning for both colors at once. So, after his first two bans for blue (Necropolis and Conflux), I understood not only the result of the ban for the first game (Stronghold-Tower), but also immediately for the second (Dungeon-Fortress). It's depressing...
2) To allow the possibility of playing with the same towns.
3) To put the squeeze on those who don't know how to play a certain town. Because they will have to ban that town not only for themselves, but also for their opponent.