Again, you submit a profile, and if you're accepted, you check other members' profiles before you contact them. Dating and matchmaking services are often secretive about just how their service works until you actually come in to talk to them about it. However, many will advertise and offer a more person-alized service than the ones above. If you enlist one of these company's matchmaking services, you will likely provide a good deal of information about yourself, including physical features and habits, education, likes and dislikes, etc. Often you'll be promised an interview of an hour or more so that the interviewer can get to know you and, supposedly, be better able to find you a compatible match.
Some services claim that their matchmakers are psychologists, as well.
Before you get this far, though, you'll undoubtedly be asked to sign a contract with the company, and what you pay can range from several hundred to several thousand dollars for a given number of dates over a given period of time. Overall, you can pay several hundred dollars for each date. While Better Business Bureau files include numerous such companies which have not generated complaints, some have. Often the complaints will include allegations of high pressure, such as that if you don't sign the first time you come in, the cost will increase significantly. Also claims of successful matches can be exaggerated.