Points are awarded based on interactions with the site:
Invite a colleague: 1 point for each invitation, 10 points for each acceptance (follow the “Send Invites” link under your profile to invite colleagues – check that this doesn’t land in their Spam folder). Please don’t try and cheat the system by inviting yourself on other email addresses and creating a bunch of alias accounts. People doing this will be disqualified from the free registration offer.
Update profile photo: 10 points
Most other activities: 1 point