Sorry

this is ROI

Apologize

Source https://www.dash.org/masternodes2/

Masternode Income

Masternodes cost money and effort to host so they are paid a share of the block reward to incentivize them. With current masternode numbers and rewards masternodes earn approximately a 11% return on 1000 Dash for the year of 2016. This reward falls off in subsequent years but as the value of Dash is rising and the supply of Dash goes down, masternodes should still be sufficiently incentivized.