Running a Masternode with POS coins can bring you profit but simply running a node doesn’t make anything, u have to buy coins first.
Well you just repeated what MadGamer said at post #2.
I don't run a node but to those that doesn't have an idea on how much you need to start before buying those coins.
Check
https://masternodes.online/ to have some thoughts.
POS and Masternode coin is a terrible idea, i have bought kickcoin and they give me a monthly airdrop that was even better rather than the annual return that has offered by those POS or Masternode coin.
You keep your own amount in your wallet and you got the privatekey and finally, you get your monthly airdrop.