Number of ranked matches a player can play in a period?

Don’t you think there should be a limit and the button be disabled after that limit?

Ranked and Unranked most of times have the same difficult to me.
Why not a limit for ranked? N number and one credit to play one ranked with humans?

By Day, Week, Month or Season ?

Well I don’t think the actual system of rank is fair to evaluate the players.
You should rethink about it if launch a new version.