The rollout of our new billing system seems to have been smooth — so far, fingers crossed! — and with this you now get better controls over who is part of your Account Team:

Please note that you don’t get charged for Visitors: if someone is only a Visitor on your boards — i.e. is not a Team Member or Board Admin on any board you own — you don’t need to pay for this person.

It doesn’t matter how many boards this person “visits”.

Visitors do show up on your Manage My Team list in the Manage Users tab, so you are reminded that they have access to some, possibly all, of your boards, and you can remove a Visitor entirely from your Account in the same way that you might remove a Team Member or Board Admin.