It actually says 6 months (200% ROI), i.e. if you invest 2500 coins and set up a masternode you will have 5000 coins in total in 6 months time, and 7500 coins in one year. Of course, if you are going to stake your received coins in the meantime and set up your second mn in 6 months, you will get even more than this. So, overall it looks not bad at all at this rate.