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.
For example “perceptive” and “physically fit” men attract between 58-143% more interest from women who want to get to know them better.
While “sweet”, “funny” or “ambitious” women get between 28-38% more approaches.
Once a profile has been created, members can view the profiles of other members of the service, using the visible profile information to decide whether or not to initiate contact.
Some sites are completely free and depend on advertising for revenue.
In 2008, a variation of the online dating model emerged in the form of introduction sites, where members have to search and contact other members, who introduce them to other members whom they deem compatible.