Also, don't use Imgur to host image libraries you link to from elsewhere, content for your website, advertising, avatars, or anything else that turns us into your content delivery network.
Yes, that clause in particular is very concerning for our site. On the one hand, I don't know how they'd be able to determine that the images on Imgur from our users are being posted elsewhere, but it is very much how forum users have used Imgur.
I know that I have a few images I've hosted on Imgur, so I'm definitely going to download those and make sure they're backed up.
And to be honest, are the alternative hosting platforms more trustworthy?
That's the problem with image hosting platforms, I guess - you never know when the image host is going to change terms, or kick the bucket, or otherwise compromise your images. And I don't think our forum itself has the capacity to host all its own images - that'd require very large amounts of storage space that we presumably don't have.
I can ask Hushpiper, who manages the databases, if there's any way we can get an idea of how many images we'd need to back up. In order to properly back up any substantial number of images, though, we'd have to have a team effort and also concentrate our efforts on particular areas - I suspect it would be very difficult to try and back up every single image on the forum that is hosted on imgur. Potentially focusing efforts on areas like forum events (eg. the advent calendar) and the main art threads would mean we could prevent major losses without working people to the bone (I'm studying and also just got a new casual job, and I know most other people here are also doing other things with their lives).