For the use of BBB, we charge you a monthly flat rate of €5 per group and project in which we want to use BBB. This means you can use BBB in your groups and projects as often and with as many participants as you like.
The reason we do not make BBB available for free for all groups and projects is because the meetings cause a significant server load, which results in higher costs for us. Since not all groups and projects need BBB, we believe it is fair if those who actually want to use BBB pay for it.