I have in the past moved images on Photobucket from one folder to
another causing them to disappear here.
When I switched them back again they then reappear here.
No problem there.
What concerns me is the fact that apparently after a certain time
of non activity on Photobucket the account is canceled and your
images are removed/disappear.
Therefore as the older members, myself included, pass on there
are going to be a lot of empty spaces.

I've jokingly said to the wife that after I'm gone she should
every once in awhile log on to Photobucket to keep it alive.
Her answer:
Sure, sure