If they are block with without reasonable cause, we would have known by the announcement of cointelegraph but we haven't read any in their site.
They don't have an idea on why they've been blocked until now. Yes, they will announce if they ever found the cause but there's none. There have been some rumors that they've been personally attacked by facebook but I don't think that Facebook will do that for a cause.
Facebook uses different algorithm to track and ban fake and decisive pages. Cointelegraph may have unknowingly triggered it and caused an autoban. But considering the size and influence of cointelegraph, they may have reverted the ban on complaint. Facebook is taking crypto related ads, there's no reason for it to ban a crypto news site.
I don't think that they'll be counted as that.