Given the Imgur news, I have made an archive of all of the Imgur links from Textkit, and will be moving them to a CDN and editing all old posts to point to it instead, at some point in the next few weeks.
I will see about enabling some sort of local image upload for Textkit. This has various annoyances (mostly time), but what else can we do?
I recommend that new posts avoid hotlinking Imgur images going forward.