You know what... now that I think about it.... go ahead. Everybody buy more and more masternodes... who cares. Invest your life savings in DRK, why not.
You will play into the feedback loop that will make mining more profitable evertime you take 1000 DRK off the market.
So please, just do as you wish, lol ...

Not running any master node myself. And yes, I could if I wanted. Multiple.