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.
Most sites allow members to upload photos or videos of themselves and browse the photos and videos of others.
Sites may offer additional services, such as webcasts, online chat, telephone chat (VOIP), and message boards.
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.).
This metaphor of the marketplace – a place where people go to "shop" for potential romantic partners and to "sell" themselves in hopes of creating a successful romantic relationship – is highlighted by the layout and functionality of online dating websites.
The marketplace metaphor may also resonate with participants' conceptual orientation towards the process of ﬁnding a romantic partner.
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. By 2007, many prominent studies show that Baby Boomer interest in online dating have soared.
However, market share was increasingly growing by several large commercial services, including Personals. Some online dating websites provide webcam chats between members.
Some sites provide free registration, but may offer services which require a monthly fee.