I run a couple SmartCash smartnodes in the interest of diversification but the majority of my crypto passive income comes from Minnowbooster. You’re right, the returns are far superior to anything else I’ve seen. Another way to earn with Minnowbooster is by using it to sell your vote which earns you SBD. It’s a toss up which method is better. I both delegate and sell my vote, and try to balance the two methods to maximize my returns.