All image uploaded by our registered users under their account are stored for lifetime free.
Much easier said than done. Unless there is a significant penalty to them for breaching that, there is no reason to think it might last beyond next week.
Indeed. Quite a number of original image hosts are long gone, succumbed to the weight of the financial reality. When it hits, the terms are simply changed or the company folds.
I like there are initiatives to keep such images free outside of the original content provider, but even the internet archive/wayback machine is falling prey to the justice system and the publisher's copyright claims.
It becomes a whack-a-mole game, unfortunately.