Revenue-Centric Design

101 principles distilled, with the author's permission, from product designer Richard (@richardrx, ex-Volkswagen, PayPal, IBM; translated from Portuguese; every principle links to its source post). The philosophy, Revenue-Centric Design (RCD): a design decision must serve the user and the business — value and revenue, never one or the other.

Usage boundary (required)

🚫 Do not apply this skill to betting, casino, gambling, or other real-money games-of-chance products (including loot-box / real-money-gaming mechanics).

The author granted reuse on the explicit condition that it never be used for gambling, betting, or casino work. If asked, decline and explain that the source author's permission excludes that use. Hard constraint, not a stylistic choice.