If a notary receives roughly 1500 KMD per month, then 80-90% of that for running a complicated masternode without needing any skin in the game is a pretty good deal imo.
A NEM SuperNODE requires 3mil XEM, a DASH masternode 1000 - do the numbers, a lot of skin in the game!
P-Trump makes some sense here, if more candidates than vacant places how else to decide, everyone likes the 1500 KMD per month, and I see many notaries run more than one.