The Coin is used only to buy more skins. It is given to the player when they die if they were signed in, and they get an amount proportional to their maximum score when they died. In FFA, and E-FFA, it is 1 coin for every 100 points, in Teams, it is 1 coin for every 200 points, in Defuse, it is 1 coin for every ten towers destroyed, and 5 coins for every player kill, in 1v1, it is 10 coins for every player, or clone you kill. Since April 2021, Serial has introduced a fix to reduce the farming of coins on empty team servers. Here is a video on how to farm hundreds of coins per minute: https://www.youtube.com/watch?v=uBU3KxE6ELo
