Introduction sites differ from the traditional online dating model, and attracted a large number of users and significant investor interest.

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At the end of November 2004, there were 844 lifestyle and dating sites, a 38% increase since the start of the year, according to Hitwise Inc.

The stigma associated with online dating dropped over the years and people view online dating more positively.

While some sites conduct background checks on members, many do not, resulting in some uncertainty around members' identities.

For instance, some profiles may not represent real humans but rather "bait profiles" placed online by site owners to attract new paying members, or "spam profiles" created by advertisers to market services and products.

John Corpuz flip-flopped between computer science and creative writing courses in school.

As a contributor to Tom's Guide he's found a happy middle ground writing about apps, mobile gaming and other geekery.

Over 50% of research participants in a 2011 study did not view online dating as a dangerous activity, whereas 43% thought that online dating involved risk.

Because online dating takes place in virtual space, it is possible for profile information to be misrepresented or falsified.

Such companies offer a wide variety of unmoderated matchmaking services, most of which are profile-based.