Its not up to the mods, its up to the admins who develop the site, us mods only have minimal input on stuff like this. At best we get a first look at things or have more direct access to the admins for presenting ideas, however we can tell you either due to inside knowledge or potenitally due ot being here long enough to know on why something might not happen.
In this instance us not having site wide image hosting is because it takes space, and we are ultimately not a file hosting site. We do minimal hosting of files for what Cyprezz has decided was necessary but I know there have been places like chat that once had the ability to have images posted that no longer do either because of the fact that it takes space and therefore resources that could be used elsewhere on the site, or because of moderation issues (like chat) where it just wasnt worth the effort to monitor for the small benefit it gave.
I doubt the exploit you are using will be fixed but it doesnt mean it is okay to continue doing so, instead upload to sites whose purpose is to host images like imgur and then link those here for what you are doing. You dont need an account to use imgur and is fairly reliable. Imgur started as an image host site for reddit before becoming its own separate thing, its what it was made for. Keep in mind moderators can still see anything you post as a draft, even if you delete it or never make it live, we just have to look for it specifically.
