DragonBox Shop on Mastodon

So, to understand better how mastodon works I had a read of this:

If I understood correctly, an account should be added to this site to be discoverable, and maybe ED still didn't do that:

Also I see that his posts have no TAGs at all, but them seems very important in the network, because are the only way to search for contents.
Hey, is there a way to embed Mastodon into the forums? I get tired of looking at ED’s two year old Twitter feed.
I tried different servers, and only on few of them I can find the store

For example this is one of those that can't find the domain: