I’m being prompted to download Downloadfile.bin when I load the linked to URL.

No points here, only crowd voting based sorting.

Ah, OK, thanks. Nice with so much redundancy!

Kinda odd that you’d still be able to comment, even if the original is unavailable, but also nice.

Say A comes up again. Will comments I made on B while it was down be pushed over?

If you post a new comment, it won’t leave your instance, but all the old posts/comments will still be there.

Could you clarify this for me? Say I follow a community on instance A with an instance B account. Then the community is mirrored on B, including comments. I comment on a post. Then is my comment stored on both A and B?