Because that we are in the hopes that someone would want to remain a member of our community. Thats what makes this site great users, "want" to come back for more. So the site took you an extra minute to get onto by registering. Hopefully someone would be impressed by the quality of members and MODs alike.
Customer support as well, we try to the best of our abilitys to go that "extra mile" to try and figure out someones problem, granted they spent a little time searching around our own forums for the answer.