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.Other sites target highly specific demographics based on features like shared interests, location, religion, or relationship type.

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Further, the 2016 Pew Research Center's survey reveals that the usage of online dating sites by American adults increased from 9% in 2013, to 12% in 2015.

Further, during this period, the usage among 18- to 24-year-olds tripled, while that among 55- to 65-year-olds doubled.

A 2005 study of data collected by the Pew Internet & American Life Project found that individuals are more likely to use an online dating service if they use the Internet for a greater number of tasks, and less likely to use such a service if they are trusting of others.

It is possible that the mode of online dating resonates with some participants' conceptual orientation towards the process of ļ¬nding a romantic partner.

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.

Some sites are completely free and depend on advertising for revenue.

Others utilize the freemium revenue model, offering free registration and use, with optional, paid, premium services.

Most free dating websites depend on advertising revenue, using tools such as Google Ad Sense and affiliate marketing.

Since advertising revenues are modest compared to membership fees, this model requires a large number of page views to achieve profitability.

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