Every time I have designed a system with the goal of making money, the system has gotten smaller, meaner, and less itself. Every time I have designed a system with the goal of being worth building, the money has found its way in through a door I did not know existed. The paradox is real and I have stopped arguing with it: building for money corrupts the building, and building well attracts money. Think foundations. Think invention. Think the thing that deserves to exist. The spreadsheet will catch up, and if it does not, the thing was still worth building.
Build for foundations; the money comes sideways
Learned across a decade of startups where the products designed around monetization died and the products designed around obsession lived.
When the choice is between a business decision and a craft decision, lean toward craft. Money made from craft compounds; money made from manipulation does not.