DASH is the only one I can think of where the price went up as more masternodes were added. The majority of the masternode copies out there do not follow this rule.
Yes, the exception is much correlated to Dash exceptional value which has delivered up to the expectations allowing its price to sustain. The goal with magnet is to deliver and focus on such points as well, differentiating and bringing value through ongoing feature releases (the coming weeks will shed light ont he bigger picture).