The unexpected change of the Miro Free Plan

 The help center for Miro's free plan advises me to delete one of my three most recent boards to create a new board. This is absurd. It is a major change to the board usage policy. The introduction of this change was kept quiet by Miro. This is highly unfair behavior! As a user, I was completely caught off guard at the beginning of the school year. On top of that, I am being told that there is no significant change! Please provide an explanation.