Building this community (this forum): defining and stating its purpose

The welcome message

Did it reappear as a banner (with the blue background) after the first two dismissals?

I guess that it remains as a pinned topic after being dismissed as a banner – see for example the second shot at First impressions (preview) – but the nature of pinning with Discourse allows pinned content to be not repetitively obstructive.

After a first reading (maybe a first full, unrushed reading) of what’s pinned, the content is automatically unpinned for whoever read it. And each user has the option of re-pinning for his or her self.