The truth is that almost all masternode coins are a SCAM.
Every day comes more and more MN shitcoins scam at masternode.online.
Usually only 1 dev, clone some coin, change the logo, clone the wallet, whitepaper, etc and make a HUGE PREMINE and put very high MN reward.
Create a new user here at BitcoinTalk, makse a ANN saying some shit.
So he sells MN and list in exchanges that require nothing like crypto bridge and graviex and start to dump his premine.
Probably this coin dies withih 30~60 days and who bought MN have a big loss.
I wouldn't say almost all MN coins are scams... There's some really good masternode projects out there like Zcoin, Innova, Pivx, Qbic, Syscoin, and more. It's definitely important to do research as you would with any coin you invest in, but again, I wouldn't go to the lengths of saying almost all MN coins are scams.