Noticed the extra added query parameters to URLs on #discord?
"is", "ex" and "hm"

They will be taking measures to prevent direct linking. Soon you won't be able to use them as an image/file host any more. You probably shouldn't have in the first place, but it's been a useful feature that are going break a lot of old links similar to imgur's change some time back.

EDIT: Was announced in the developer server which I missed:
#filehost #filehosting #hosting #imagehost #enshittification