Other sites are more specific, based on the type of members, interests, location, or relationship desired.

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 amount of tasks and less likely to use such a service if they are trusting of others.

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

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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.

In Germany government financed NGOs like "Verbraucherschutzzentrale" sometimes help to sue online dating sites.

This problem is referred to as "catfishing" in pop-culture and has been made famous by a popular MTV program called "Catfish the TV show".

Due to the level of competition between free dating sites, as well as the overall drop in traffic to and revenue for dating sites generally, This represents a break from traditional externally sourced ads and is just one of the ways that the revenue models of free dating sites are evolving.

Especially popular in Eastern Europe, some sites offer full access to messaging and profiles, but provide additional services for pay, such as bumping profiles up to the top of the list, removing advertisements, making paying users' profiles appear several times in different places in the search results, and giving paying users a more advanced search engine to work with (in one example, free users may only search for persons of specified age, gender, orientation, and city, while subscribers may search for any and all parameters listed in profiles, such as height, weight, interests, etc.).

A German documentary analyzed the market and uncovered multiple problems of online dating sites.

Amongst them are "romance-scamming" (persons registering on the sites to get money from people falling in virtual love with them), using controllers or animators registered with multiple fake accounts, using unexpected and sometimes unlawful conditions in the terms and conditions leading to longer contracts a client intended to sign.

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