GDevelop is free and can be used for profit or non-profit game making. GDevelop runs on Windows, macOS and most recent Linux distributions. You can also try it online using Chrome, Firefox or another recent web browser.
Vendre votre jeu, publier des contenus supplémentaires, ajouter des publicités dans des jeux… il y a de nombreuses façons de monétiser un jeu. If you have a good quality game, it might be a good idea to find a game publisher that could help you to reach more players and monetize well your game.