Yeah, I found this site and did theoretical calculation, too. I was more curious if you are doing it for real and get rewards.
I was checking the site that lists all Masternodes. For me, most of them look like a scam. And in that case it is not very profitable to invest in those games. Trading is more profitable.
Trading could be profitable. But a miner's way of thinking is to set it up once, automate and forget. You'll end up with few tens of ZEN, and each ZEN could be 100 USD.
That is an admins way of thinking, too. I'm still thinking.
think before leap.