In fact FB declines Post and Messages for a while already.
For example you can't post or comment and include a picture from imgur, while it (obviously) fine from other hosts.
Thats what i experienced so far, but i can imagine there are other examples.
That does not need to be censorship.
Might be that they got an agreement about not hotlinking or hosting imgur images for copyright reasons.
In fact FB declines Post and Messages for a while already. For example you can't post or comment and include a picture from imgur, while it (obviously) fine from other hosts. Thats what i experienced so far, but i can imagine there are other examples.
That does not need to be censorship. Might be that they got an agreement about not hotlinking or hosting imgur images for copyright reasons.