He explained it to me over Discord, so I can relay the sacred instructions. Be warned, it’s Ultra Janky™:

1. Upload the image to cubeupload or imgbb (no other sites are supported afaik)

2. Navigate your browser to the direct link of the newly-hosted image (that is, the page that has the image’s file type extension at the end of the URL)

3. Right click on the image and copy it. Don’t copy the link, copy the image itself

4. Go to the wasteof post editor and paste the image

After doing that, you should see the image that you copied. If you press post, it will be included with the message