IF, for some reason no agents have responded to a post in "Bargain Finder" the system is not set up to send out e-mail.
It is set up so there are no direct responses to the poster... to avoid people posting getting spammed or bothered by agents.
Once TAs do respond to a post, there is still no direct contact, until the poster chooses to persue it.
As well, there are no Travel Agents who work for the site, checking the Bargain Finder postings. It's just a convenient means of putting shoppers and agents together.
And I believe in most cases can be very effective!