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.
"I left my heart out there, and this guy took advantage of it," the 51-year old Best said.
In 2011, the FBI's Internet Crime Complaint Center received 5,600 complaints from victims of so-called "romance scammers" -- criminals who scan online dating sites, chat rooms and social networking sites for potential victims.
The victims reported collective losses of $50.4 million, which is likely only a fraction of the actual losses since many victims are too embarrassed to file a report, the FBI said.