At a rough guess, miners generate the equivalent of 12-13 masternodes per week. Masternode subsidized mining is a scenario supported by this coin's protocol. It isn't possible in any other mined coin so to whatever extent it occurs in practice it's a valid point because it recovers the lost mining reward and changes the economic incentives for miners.

It's just yet another example of the flawed assumptions behind the current reward split policy - that masternodes and miners are a mutually exclusive group. (Though maybe that's the whole idea, if undeclared. I remember Evan wanted to implement a system where you had to hold Dash to mine in the first place. I can't remember what it was called).