10. One or more non-transitory computer readable storage media storing computer executable instructions that, when executed, cause a device to: determine potential members associated with a user based on an electronic mailbox associated with the user; determine a plurality of conversion rates respectively for a plurality of invitations based on a respective number of persons that joined a contact information sharing network after being sent a respective one of the plurality of invitations to join the contact information sharing network; determine, based on the plurality of conversion rates, a highest conversion rate invitation of the plurality of invitations; and send, to at least a subset of the potential members, the highest conversion rate invitation.
10. One or more non-transitory computer readable storage media storing computer executable instructions that, when executed, cause a device to: determine potential members associated with a user based on an electronic mailbox associated with the user; determine a plurality of conversion rates respectively for a plurality of invitations based on a respective number of persons that joined a contact information sharing network after being sent a respective one of the plurality of invitations to join the contact information sharing network; determine, based on the plurality of conversion rates, a highest conversion rate invitation of the plurality of invitations; and send, to at least a subset of the potential members, the highest conversion rate invitation. 12. The one of more non-transitory computer readable storage media of claim 10 , further comprising computer executable instructions that, when executed, cause the device to: generate a report comprising a frequency bar graphically representing a frequency of electronic mail communication with the potential members.