The nature of humanity often appears to be people projecting who they want to be rather than who they are, and most services work hard to get to the truth. The questions they ask their members are designed to reveal their true thoughts, hopes, and dreams. While these are often designed by experts, the amateurs using these services are sometimes still able to defeat the purpose. These are the people who suffer through the unsuccessful matches, but it is not always their fault.
One of the needs of any matching service is a large base of people using their service because they need to be able to sort through them to find possible matches. The larger the number of users they have, the easier it is to match them with someone compatible. If only a few users are on their service, it might result in many people coming away with one or no matches at all. Avoiding this is important for services trying to grow their popularity and be able to advertise the success of their members.
While matching them up is the beginning of a potential relationship, the users with little success might believe they are being taken advantage of by the service. It is an unfortunate fact that their ability to sidestep the selection criteria is partly to blame, but the nature of human reality can also be a factor. Some people will be able to ruin almost any date they are on with their own nervousness or unconscious desire for it to fail.
The popularity of matching services online has grown over the last few years due to its ability to get around the perversity of the human psyche and make successful matches. For those single people who want someone to come home to, using a service might be a good way to meet their significant other.