Eh, not to be negative but their hardest work is still ahead. This reminds me an awful lot of Quora early days. Hyper growth because they tapped into a chatty community with both passion and technical knowledge. They even got some fringe no-tech questions answered (both Quora and RG) in spaces that were universally debated and ubiquitous.

Unfortunately when they (Quora) started to try to scale new verticals the growth rate was significantly reduced and panic set in on both the leadership front as well as the investment front. The act of debating is what drives annotation, not the act of annotating itself.

I'm not saying that the can't do it, in-fact they seem like some ballin' ass hustlers, but they have in fact not yet solidified a product to market fit that can scale universally.