Can't all users add an avatar? Or no?
No. Only scammers and only if they pay for them.
Haha. Not really true, but accounts with an avatar do have at least some prestige, but not much really. The only thing it says is
you signed up a while before me.
Allow me to explain. Avatars went out a while ago for security reasons, but old respected members of the forum still have them, and they sell their accounts to scammers. These scammers buy them, then they commit scams under them.
If someone gets scammed from trusting an account merely because it has an avatar then I honestly don't know what to say to that. Avatars will be back with the new forum anyway.