Good question one thing that is happening is that asset manager use bpo companies and those companies give the assigment to Real Estate Agents. Now becarefull to wich company do you sign because righ now there are a lot of companies that you need to pay monthly fee or they charge you for every zip code your choose. But the best way and its free http://bpo4agent.com/
there you can find a lot of companies that are free. One thing keep in mind that BPOs compaies they want to get the job than as they say and in the time that they specifie. In this way after you get the first BPO they will keep your profile. Also most od the companies just put the job in their system so the agent that first get the assigent it is the one that get the job. I have been doing this and really work for me. Just be log in the compies system the most time possible.