You can join as..
- Basic member join 10 groups at the same time
- Plus member join 50 groups at the same time
- Premium member can join 50 groups at the same time
If you reach these quotas, you will not be able to join another group. However, if during the course of your JOYclub membership you decide to change your membership, e.g. from Premium to Plus Member, you will continue to be a group member in those groups in which you were previously an active member.