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".
Some sites such as Ok Cupid.com, and are free and offer additional paid services in a freemium revenue model.
Some sites are broad-based, with members coming from a variety of backgrounds looking for different types of relationships.
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.
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.
Also, this model generally allows users to switch between free and paying status at will and without having to do anything, simply providing advanced features for a set period of time whenever the according payment is received.
Ease of payment is also generally higher, with such sites accepting a variety of online currencies, letting users charge the payment to their cellular phones, etc.
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 : )!