Is that why you've been making totally meaningless posts all day? You need 10 posts and 10 days of membership. Both criteria need to be satisfied, and it's certainly not difficult to make 10 meaningful posts in that time. So stop trying. Not having an avatar is not the end of the world. Posting meaningless posts is very annoying, so I've removed them. Don't try this again.
And yes, an avatar picture can be loaded from another website. It cannot link to another website, though. You can link to your homepage/website in your profile.
Topic closed.