Most users are yield actually. Suppose I spent $1000 on CUB at $1 price. I'd have 1000 CUB to deposit to some kingdom or den with very high APR. Let's say after a couple of months I got yield of 500 CUB printed from thin air. The CUB price at that time would drop to $0.5. Thus I would have 1500x0.5=750 USD. That's how I became the yield
RE: If you can't explain the yield >> You are the yield.