Welcome to the Q&A Forum

I've only just noticed that the Moz' blog categories have been moved within a pull down menu. See it underneath : 'Explore Posts by Category' on any blog page. This means that the whole list of categories under that pull-down is not crawlable by bots, and therefore no link-juice flows down onto those category pages. I imagine that the main drive behind that move is to sculpt page rank so that the business/money pages or areas of the website get greater link equity as opposed to just wasting it all throwing it down to the many categories ?  it'd be good to hear about more from Rand or anyone in his team as to how they came onto engineering this and why. One of the things I wonder is: with the sheer amount of content that Moz produces, is it possible to contemplate an effective technical architecture such as that? I know they do a great job at interlinking content from one post onto another, so effectively one can argue that that kind of supersedes the need for hierarchical page rank distribution via categories... but I wonder : "is it working better this way vs having crawlable blog category links on the blog section?  have they performed tests"   some insights or further info on this from Moz would be very welcome. thanks in advance
David