Self hosting or wordpress.com?

This is not about what is more expensive but which choice is better to start up a new blog with no traffic using wordpress software. When choosing wordpress.com for hosting you get the free marketing where wordpress users might find your blog browsing the wordpress.com blog topics. Users won't have the hassle to sign up in order to leave a comment.
When self hosting you won't get that free marketing traffic from wordpress.com or am I wrong?

See original post by fitnessmotto