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For some reason I assumed the changelog was primarily on kagi.com/changelog and secondarily on the feedback forum. In that case it makes sense that the images are hosted on kagifeedback.org.
The way I approached this issue was by applying the guidelines from writing documentation, i.e. no documentation images should be hosted on kagifeedback.org even though there are quite a few currently being hosted here.
In the rare scenario that something were to happen to the feedback forum1, it would make sense that the images are hosted elsewhere so they wouldn't be wiped. Overall the first point was the primary purpose of this suggestion but the second one would be nice to have, if someone can be bothered to move all future changelog images to kagi.com/assets/ or something similar.
1 Flarum upgrade going horribly wrong, someone deciding that we need a fresh start and wiping all old suggestions and reports is the way forward — this idea has been mentioned a few times on orionfeedback but search engine and browser bugs are obviously two very distinct items