Yep, there's a lot of anger on forums at the action PhotoBucket has taken; no notice given and a ransom demand of £399 a YEAR to allow linked pictures to be displayed
My threads on 3 forums are ruined.
The only way forward I can see is to move pics to another host (I have a Flickr account) and replace all the links, a lot of hours of work
If you right-click on the PhotoBucket "block" and select "view in another tab", at least you can see what photo has been blocked, and does give the casual viewer a way to see what is missing. Oddly, when I did this, my photos reappeared for about 24 hrs, then got blocked again