I tried to make it kind of distinctive (my service will be inconsequential since it's just a hobby) such as (a)with anonymous posting, (b) the key system, (c) community boards, and (d) boards for add-ons, builds, AND screenshots.
(a) Anonymous posting turned out to be malicious.
(b) "The key system"? You mean unique identification for each addon? That has never been done before.
(c) We already have the Blockland forums.
(d) Builds will be the only good distinctive feature you have, but... screenshots? What is this, Imgur?
Anyway, I found a bug: When choosing the board for your submission, you can see this when scrolling down:
So community favorites appears 17 times in the dropdown, and beside the bug you can also upload any file on the community favorites board even if it's not really one.
Also, NSFW appears for a second time here, and a redundant "Addon Packages" appears even though we have a board named "Addon Packs".