I used to have a Free plan and created boards that are shared and in use by 30+ people, each. Everything works fine, good experience for all, love it.
I upgraded to a paid Team plan, for me and my direct team members, with the idea that each paid team member could now create more boards (well, at least more than 3) and could invite unlimited free users to collaborate.
Reality is that as soon as a new member is added (Free User that gets the link), I get a mail from Miro that my Team Size has increased and I need to pay more. In the meantime, I managed to restrict access, but 17 users sneaked in and thus my bill is exploding.
This means that you get more advantages using a Free plan (yes, only 3 boards) and unlimited number of users than using a paid plan.
Any way to fix this? So, paying for a Team Plan, but with unlimited Free users that can edit the board during a session without exploding my bill.