Most services also encourage members to add photos or videos to their profile.
Once a profile has been created, members can view the profiles of other members of the service, using the visible profile information to decide whether or not to initiate contact.
Dedicated to verified college students and alumni (via education database). Alumni cannot initiate or respond to contact or post status updates.
Members only see intersection of what they are looking for and what other members are looking for. Free messaging and status posting for undergraduates (5 messages/day limit).
Such companies offer a wide variety of unmoderated matchmaking services, most of which are profile-based.