A great diversity of online dating services currently exists.Some have a broad membership base of diverse users looking for many different types of relationships.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.Most services also encourage members to add photos or videos to their profile.
Others utilize the freemium revenue model, offering free registration and use, with optional, paid, premium services.
Niche sites cater to people with special interests, such as sports fans, racing and automotive fans, medical or other professionals, people with political or religious preferences (e.g., Hindu, Jewish, Christian, Muslim, etc.), people with medical conditions (e.g., HIV , obese), or those living in rural farm communities.
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.
Other sites target highly specific demographics based on features like shared interests, location, religion, or relationship type.
Online dating services also differ widely in their revenue streams.