I think that they aspire towards "decentralization," which I seem to recall that in their "original vision white paper" they define decentralization as having a minimum of two nodes, perhaps Roger and Jihan were specifically mentioned in the "original vision white paper", though in practice, rather than theorizing, those two ratts will probably NOT be the bcash node last bag holders...  and will likely abandon the bcash node ship much earlier than two.  Sad but 110% completely true...