Not looking for conspiracies, but the post about JustFab[1] just disappeared off the front page suddenly. This was noticed and discussed in another thread[2] here. It would be great to understandt why this happened. Was it in violation of some HN protocol or was it simply killed by the algorithm?
[1]: https://news.ycombinator.com/item?id=6455391
[2]: https://news.ycombinator.com/item?id=6467393
http://hnrankings.info/6455391/
The discussion you link to shows the usual conspiracy theories, but this seems to me to have all the usual hallmarks of enough people thinking the item is inappropriate and just flagging it.
If you hang around long enough, and pay really close attention, you start to see the dynamics at work. Most people just throw up their hands and shout "Conspiracy! Conspiracy!" and demand answers from TPTB. But frankly, this just looks normal to me.