Tried to upload my Theme (Used the top bit of some old Destiny 1 Promo Art that was shades of blue with white specks) so others could use it, but it was removed in only 11 minutes for and I quote "Content, specifically Spam: This item has been identified as deceptive, high-volume commercial content which is not permitted by AMO."

There are plenty of other Themes that use Destiny as well as other game IPs. I only tried to upload one that I felt looked good that wasn't similar to any others that I could find and yet it didn't even last 11 minutes.

That said, the Extension itself is good and works well. Just don't try to upload anything for others to use apparently.