This document discusses various monetization strategies for games, including premium advertisements, rewarded ads, in-app purchases, subscriptions, and psychological factors. It provides examples from Imperia Online of using in-game currency, daily events and offers, items/collectibles, research time reductions, and alliance subscriptions. It emphasizes introducing monetization early, having a variety of payment options, leveraging emotions, taking care of paying players, and fine-tuning offers based on player data analysis.