If you see 'Pending' next to someone's name, it means you have invited them to create a BeamReaders account, but they haven't activated their account yet. You may want to contact them to let them know that they should check their e-mail and look for an invitation to activate a BeamReaders account.
They need to click the link in the invitation e-mail they received to activate their account. There is no cost for them to have a BeamReaders account. Once they activate their account, 'Pending' will no longer appear next to their name.