Sometimes people move on. Two or three yrs ago there may have been less users, not interactive so they just forgot about it. Sometimes they forget their password, then just make a new account. Or, some people work a lot. Some can be test accounts KidzSearch made to see if they work a lot. Sometimes parents check if KidzSearch is kid friendly, and they see it is and make their kids make accounts. There are over 6,000 people on kidzsearch. They have their own reasons of leaving their Account.