This document discusses prototyping monetization strategies early in game development. It recommends taking a four step approach: 1) Define the core progression and what can be sold, 2) Ensure the game mechanics, sessions, content and economy can scale for years, 3) Define and tighten triggers that motivate player spending, and 4) Prototype with pacing and monetization mechanics incorporated to test them. The key messages are that monetization should be considered from the start, the game needs a solid base that can sustain long-term player engagement and progression before adding monetization features, and prototyping with monetization elements helps evaluate what works well.