I checked Gainer coin on masternodes.online, and ROI is 795.77%.
Gainer (GNR):
Price: $1.0000
$2,119,580 795.77% 110 5,000 $5,000
Market cap: $2,119,580
ROI: 795.77%
Required : 5000 coin
2 days and ROI decrease from 795.77% to 535.61%. I wonder next week maybe 300%
ROI (annual): 535.61% / 68 days
Paid rewards for masternodes: 11,959.5095 GNR
AVG masternode reward frequency: 3h 26m 5s
Masternodes total: 163
Supply: 2,127,910 GNR
Coins locked: 815,000 GNR (38.30%)
Required coins for masternode: 5,000 GNR
Masternode worth: $5,000.00 / 0.35365 BTC
That's normal and happen with all coins with masternode, the more maternodes set up ,less you get. Any for me I'm not interested in set up a maternode it costs a lots, I just want to buy some coins when it get listed on cryptopia.