WTF I'm not getting here?

So with one node (42 ZEN) I can earn that much money per month??
Number of Secure Nodes = Number of Secure Nodes in the whole network try with 800~4000
IF this is true then this is not good for investitors...if there would be 4000k of nodes than the reward is 1.56 ZEN this is no go. It should be a fixed reward of one node.