Earlier quoted context omitted.
They probably consider it ransom because the terms were changed after the relationship was established. Unlimited linking probably doesn't include embedding. So, if they were on a lower end plan, something that used to be offered was taken away. After they invested time in uploading and embedding lots of images.
Terms are _always_ subject to change. We're talking about 1 dollar per day for image hosting here. These panicky reactions seem totally overblown to me. I don't think this is really about the price as an absolute number. This is more of an emotional reaction about the price changing, which some people feel is fundamentally unfair.
In any case, how most photobucket users feel about it will ultimately matter more than what we outside observers think.