It's quite intuitive to want to know more about someone who has provided an endorsement or a reference. Clearly a statement from Tiger Woods confirming that someone has great putting technique is not equivalent to the same statement from the groundsman at the local pitch and putt.

It is the nature of any profession or trade that as people progress in their career, they take on mentoring and management roles and build a network of contacts. In turn, their input to other people's profiles will then be sought. There is no difference at netBiog between a site user who is the subject of a profile and a site user who is contributing to someone else's profile.  The contributor will benefit from adding profiles to their own account by being able to give a stronger endorsement to other site users.