License when change ownership

Hi,
I want to confirm regarding Gitlab pricing,
Let say there are 3 user using gitlab, UserA is the owner and other is maintainer.
In my understanding there are 5 user for free plan.
And then the number of user are growing hitting more than 5 user, let say 8 user.

  • If the ownership change from UserA to UserB, who is gonna be charged or need register for Premium plan , is it UserA or UserB.
  • The price it will calculated for 8 user ?

Thank you if anyone can enlighten me.