Activity check is meant for cleaning teams from inactive people, so new people would have chance to join a team and the active members wouldn't need to suffer from lack of active members in their team.
Please post in this topic within 72 hours of topic creation to check activity.
All inactive members will be kicked out of teams.
However, you will be able to join back in a team (if there is a free spot left) that you were kicked out, once you return and notify an admin.