When you register as a host or helper you automatically become a Free member (hosts need to be approved first). Free helper members who provide a self-description as part of their profile can be contacted by Premier hosts but cannot contact hosts directly. If a helper upgrades from Free to Premier membership they will be able to view all provided host details and reviews in all networks worldwide. If a host upgrades to Premier membership, they will be able to contact all helpers.
It costs 20 euros to upgrade to be a premier helper, which lasts for 2 years worldwide for both single and twin memberships.