"In recent years, many disfellowshipped or disassociated individuals have returned to Jehovah after having seen Jehovah’s Witnesses carrying out their ministry in public places. Others have approached the elders after reading a copy of the Return to Jehovah brochure or watching JW Broadcasting. (Luke 15:7) With such factors in mind, the Governing Body has determined that there is no longer a need for a formal arrangement to visit disfellowshipped or disassociated individuals each year."
So, evidently, intentional efforts to retrieve the ousted are less effective than chance happenings -- indeed, so very less effective that there is no longer a need for intentional efforts (?)