Actually twice now the @stellabelle and @steemsports bloggers were broken at 2 different times. Yes they were the only ones but there were still ways to get to the page which the developers made people aware of and within a few days the problem which wasn't really a problem was resolved. I've also seen it happen to the #steemit tag. I presume it's to do with high traffic volumes I wouldn't know. But it would be silly for the developers to do it intentionally since it's so easy to find the content. If they wanted to censor it they would censor it completely.