I don't know how someone who is new will feel about Geni when they can't add their family. How do you get your kids or siblings interested when you can't add them to invite? Perhaps you can arrange to have someone input the relationship of a relative in order to invite them. Perhaps you could give them 100 profiles to add for their family or at least the spouse's side of the family.
My mother's cousin's aunt's niece is three people away but maybe she would join if she were connected. Could there be a separate private submission where you put in the connections:
Mother's Cousin, Cousin's Aunt, Aunt's Neice
and if she joins, the chain is added to the tree? Do you think some credit for inviting more people to Geni is out of the question? Maybe 25 for every invitation accepted and 3 for invitations sent and not accepted. I don't know how this site can go viral again without encouraging invitations.
I would have assumed that someone who just joined would get 100 family members to add, but I don't believe they do.