Others utilize the freemium revenue model, offering free registration and use, with optional, paid, premium services.
Still others rely solely on paid membership subscriptions.
Opinions and usage of online dating services also differ widely.
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.
Members can constrain their interactions to the online space, or they can arrange a date to meet in person.
A great diversity of online dating services currently exists.
Most free dating websites depend on advertising revenue, using tools such as Google Ad Sense and affiliate marketing.Some have a broad membership base of diverse users looking for many different types of relationships.Other sites target highly specific demographics based on features like shared interests, location, religion, or relationship type.Under this metaphor, members of a given service can both "shop" for potential relationship partners and "sell" themselves in hopes of finding a successful match.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. Selector .selector_input_interaction .selector_input. Selector .selector_input_interaction .selector_spinner.