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.The more successful the agency is, the more letters its girls receive.The more letters the girls receive, the more eager they are in recommending the agency to their friends.The agency invites all female clients to participate in "socials" though usually only ladies from the same city attend the events; most of women cannot afford to travel.The agency places advertisements in local media announcing the forthcoming gathering to ensure enough attendants.
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.
When the agency has a database of over a thousand ladies, after some period, it will start offering romantic tours to Russia/Ukraine.
At this stage the agency can afford to have an office in Russia.
If later the agency phones asking them to fetch their letters, they may come, or may not, or come in a month time - depending if their way will be somewhere close by during the agency's office hours.
If the agency doesn't phone, they will never come themselves.