Ever since the 4.4 update, coin farming is easier than ever!
However, many updates later, the Pixel Gun Company has patched coin farming, making coins harder to obtain. Don't worry, there are multiple methods how to earn easy coins! In addition, if you want to level up, this tutorial has methods too!
You can do the same method, but everytime a match finishes, leave the server and go to a different server, as you will usually have less time to fight during matches. Be sure there aren't any tryhards or players who have scores that you can reach in different servers.
You can do the same method, but everyday, you can earn double the rewards in all modes for the first time you play in a day. It's suggested to play all modes at least once, if you want to earn extra coins and experience.
Sniper Tournament is also recommended because of its shorter fight, lasting 150 seconds. It is recommended to equip a sniper rifle that either has fast firerate or high Efficiency per shot. There is no moving around, scope sway and recoil in the game, but it will take some time to get used to the controls. As long as you are in 1st place and in the winning team, you will guarantee to earn 4 and 20 .
Another method of obtaining a lot of coins is by doing the Glider Rush Minigame, it may take a few matches to get used to the controls but don't worry as there is no penalty for leaving the game. Every match lasts for 2 minutes and as long as you stay at the top of the leaderboard, you will earn a guaranteed 2 coins.
Also, in Campaign, if you have a 2-stars level, go to the easiest level in which you have 2-stars, equip your best loadout and kill monsters, but unequip your armor. Then, note that you should take health damage, otherwise, you will earn 3 and 5 , and won't be able to earn coins from that level again. Note that this method only works if you want to farm coins only.
If you are lucky to get the VIP Account (regardless of time span), you can get coins and EXP twice with the same effort!
Alternatively, you can complete Campaign by obtaining as many rewards as possible from there
This is a very fast and situational way to earn coins. When there is a Clan War and have the Monster Siege mode active, remove all your fort defenses. Then play Monster Siege. Let the monsters destroy the 3 generators and the gate. When the gate is destroyed jump on top of the treasury. Let the monsters destroy the treasury and you will get 6 coins and 30 xp. About 160 coins and 800 xp per hour.