maybe they don't like the hamb anymore. i first noticed a drop in participation from the long time members when the hamb was split into different (traditional) forums. i thought that move had a devisive effect on the membership. i think more people gave up after the redesign. maybe they thought the hamb was moving in a different direction, or just lacked the same feel that used to bring them so much enjoyment. maybe facebook allows them to continue contributing and staying in touch with a method that remains familiar to them.