I think the new wording is more uncertain, since we now don't know at what time Jottacloud will claim unlimited storage has been exceeded. They say that "in some cases where the total storage- and network use significantly exceeds the average use of a Jottacloud user, [we] can deem this use as excessive".

Before I had a hard limit to stay under, now I cannot know anymore. This was the reason I stopped using Jottacloud, going all in on ACD..