Marketplaces don't sell your product. They sell access to your product.
Fourteen years making leather journals. The craft hasn't changed much. What changed is who stands between the maker and the buyer. Used to be a physical middleman in a market. Now it's an algorithm in a marketplace.
The margin compression is the same. The opacity is worse. At least the old middleman had a face you could negotiate with.
This is what the book is about. Dibuat Pakai Tangan, Dijual Pakai Algoritma.