With 644879 Posts in 29661 Topics by 13856 Members, 100 using RSS is indeed insignificant. I don't think anywhere all of the members are active, buts its still a small number, and limited resources are best spent getting new rumors or features that more will use.
I use Facebook, and New CR posts pop up regularly, its a alternative, and there are a lot of Facebook followers, (99,129). I have CR posts set to appear first. Its certainly where a lot of the resources are best spent.