I would only consider it abuse in that case if someone simply copies and pastes the same thing every day. That is, a copy of the previous post with only a few words or statistics changed. But if the person discusses the same topic every day, yet each post is completely different from beginning to end—that is, it contributes something new—then for me it's not abuse, even if the topic is repetitive.
(Not to be confused with copy and paste) That is abuse.