The more successful the agency is, the more letters its girls receive.
Competition on the marriage market is rather tough, and active searchers move from one agency to another trying to find one that will really help.
The others stick to one agency, make friends with agencies' personnel and their visit is a way of socializing.
In the case of Western based agencies, the best way of ensuring your contact with available women is membership that allows you access to the database of new profiles, even better if it's granted to members only.
Thus you will be able to contact ladies who have just started their search, and are not yet involved in correspondence or relationship, so they are more likely to be attentive to your letters/emails/phone calls.
Western agencies usually start by placing ads in local Russian newspapers that promise to help women in search of a partner abroad. Usually a lady will send applications to 5-15 agencies that placed ads in the same newspaper.
When an agency has enough profiles to start from, they launch a website, and offer the women's information to men.The strong point of Western agencies is their large databases, but it turns out to be their weakness as well: the larger the database is, the more difficult it is to manage and keep it up to date.That's why applying to women who have been in the database of a large agency for a long time is like trying to buy a car with the help of private ads from last year's newspaper.Local agencies also place ads in the same newspapers, only in Russian.As they are situated closer, speak in plain Russian, and are physically available for satisfying women's curiosity, they have very limited but constnat flow of new applicants.The majority disappears after registration and a couple of hopeful visits with no results, as women hope that applying to an agency will guarantee her finding a husband in no time.