Many sites are broad-based, with members from a variety of backgrounds looking for different types of relationships. residents spent 9.5 million on online dating and personals in 2004, the largest segment of “paid content” on the web, according to a study conducted by the Online Publishers Association (OPA) and com Score Networks.
Other sites are more specific, based on the type of members, interests, location, or relationship desired. At the end of November 2004, there were 844 lifestyle and dating sites, a 38 percent increase since the start of the year, according to Hitwise Inc.
In the secondhand car market, a seller may know about a vehicle’s defect and charge the buyer more without disclosing the issue.Such services generally allow people to provide personal information, then search for other individuals using criteria such as age range, gender and location.Most sites allow members to upload photos of themselves and browse the photos of others.However, market share was increasingly being dominated by several large commercial services, including Yahoo Personals, Match.com, American Singles, and e Harmony.e Harmony CEO Greg Forgatch noted that despite the growing number of sites catering to specific niches, "to become a major player, it still takes a large number of people." In 2002, a Wired magazine article forecast that, "Twenty years from now, the idea that someone looking for love without looking for it online will be silly, akin to skipping the card catalog to instead wander the stacks because 'the right books are found only by accident.' Serendipity is the hallmark of inefficient markets, and the marketplace of love, like it or not, is becoming more efficient".