We continue to explore player-positive monetization mechanics. Or, simply, ways to profit from a game without generating hate from the community. 

Today's topic: transaction fees. You can create a marketplace for players to trade in-game commodities or user-generated content like skins and mods and charge a small fee for every transaction. Here are some tips for doing it right:

• User-generated content should provide value for players;
• Items sold shouldn't be able to break or influence the core gameplay;
• Pay-to-win items should be avoided at all costs;
• Do not charge a fee for listing items;
• The whole process should be perceived as beneficial for content creators. 

Although sometimes tricky to implement (we all remember the Diablo 3 auction house), a functioning marketplace can become a staple in your monetization strategy and incentivize the community to create outstanding content for your game.