Indications show that the “Give a Day, Get a Disney Day” promotion, which encouraged volunteerism with the prospect of free admission to a Disney theme park, is coming to an end. Last month, the company boasted that it had amassed more than 600,000 volunteers in the first six weeks of the program, which began Jan. 1, 2010. “We have been overwhelmed by the response,” said Tom Staggs, chairman of Walt Disney Parks and Resorts. When the program was annouced to the public last fall, Disney said it would distribute tickets to the first 1 million to complete their service. At...