Consider a client's co-write that lands on a US playlist and racks up 10 million streams in a year. When the streaming mechanical royalty arrives (the fee paid for the right to reproduce the song) it is almost embarrassingly small. Not because the song underperformed, but because the rate itself was kept low for years, set in a fight the songwriter had no part in. An adviser has to be able to explain why that number is what it is, and where in the chain it is decided.