The first way to earn Maplestory mesos is to kill monsters. Sometimes, monsters will drop weapons and items. What you need to do is just to pick them up. But many people are sick of pick them up for their inventories will quickly be filled with. At that time, you should take actions, that is, pick up all the dropped weapons and items you can see and then you can sell them to other players or sell them at free market.
You can make extra mesos from this activity. If you can persist in, you can make a large amount of mesos within one month. So each time you kill a monster, you better pick the dropped weapon and item if you have a strong desire to be a millionaire. Then you can do quests to get mesos and experience.
For example, if you do Winstons Fossil Dig-up quest, you can obtained 30k mesos. Also, you can do Party quest to get Maplestory mesos. Besides, you can do business and selling your fame to make mesos. When you do business, you should keep in mind that free market is the best place to sell your goods for you can have a high price.
If you sell your goods to NEPs, you will earn less mesos. I think in the process of becoming a millionaire, you can beg for mesos. Otherwise, you will be looked down on by other players. On the way to be the rich, you will come across many difficulties. persist in what you have decided to do. For those people who want to be the rich at once, maplestoryer can give what you want to have.