Such sites earn revenue from a mix of advertising and sale of additional options.

Online daters may have more liberal social attitudes compared to the general population in the United States.

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Some sites provide free registration, but may offer services which require a monthly fee.

Other sites depend on advertising for their revenue.

The highest scoring dating service was Facebook, which uses the personal homepage genre, the message board genre, the weblog and directory genre, as well as utilizing the Circle of Friends.

The second highest scoring, Second Life utilizes virtual worlds, message boards, chat groups and profile pages to allow people to contact in a three-dimensional environment.

Users of an online dating service would usually provide personal information, to enable them to search the service provider's database for other individuals.

Members use criteria other members set, such as age range, gender and location.

Apart from the popular social networks, there are social websites meant just for meeting and talking to someone new.

3 popular and effective websites are: Plenty of Fish, Ok Cupid, and (where you can meet someone that has a similar taste in music as you).

More recently, the impact of social networking on online dating has been featured on the Questia online research website peer reviewed article ""I Luv U : )!