If they want to monetize that old stuff, couldn't they just serve up an ad instead of an image for those ancient images, then display the full image if you visit the actual imgur page by deleting the .jpg extension?
Or they could do what Facebook used to do (still does?), and put them on Blu-ray disk cold storage, then load them into one of those giant jukebox-esque machines that grabs the Blu-ray disk whenever someone click an ancient link and spend 60 seconds serving the image up or whatever.
Hell, write all the images with their URLs to magnetic tape and donate them to the Internet archive, and let them figure out what to do with them if/when they eventually have the funds.
Literally anything would be better than outright deleting those old images.
Or they could do what Facebook used to do (still does?), and put them on Blu-ray disk cold storage, then load them into one of those giant jukebox-esque machines that grabs the Blu-ray disk whenever someone click an ancient link and spend 60 seconds serving the image up or whatever.
Hell, write all the images with their URLs to magnetic tape and donate them to the Internet archive, and let them figure out what to do with them if/when they eventually have the funds.
Literally anything would be better than outright deleting those old images.