Just to share the other side of the coin: a dutch guy I know built a sudoku game for Windows 8. It's a free app and has only 1 ad. He makes more than €100/day w

Just to share the other side of the coin: a dutch guy I know built a sudoku game for Windows 8. It's a free app and has only 1 ad. He makes more than €100/day with it. Not bad imho :)