Hi,
This is a recurring topic but only about once a fortnight, and we don't want to advertise to the hackers that created the situation that it's actually fairly automated now.
Basically, if you are new, then you need to make at least 30 genuine contributions to forums - more than just adding simple comments about someone's pictures.
If you are an older member but haven't been on the site for 6 months or more, then the Classifieds are removed, so that if you've been hacked or someone takes over your account somehow, they can't pretend to be you and offer things for sale that don't exist. If you then come back on the site and make any genuine forum contributions, your access is automatically reinstated, but if you login and change password and email address but nothing more, you'll not have the Classies reinstated. Unless you start joining in. It's not very scientific but it's the best we can do to protect people.
But as I say, if we posted this very obviously, the spammers/hackers would find a way to bypass our controls.