Why do some players lose on purpose in Clash Royale? [closed]

Solution 1:

People mainly do this because they want to lower in rank. Reason for this is that they have good cards. Then lower their rank so they fight people aren't as strong, so they can easily farm chests and gain more cards. Then repeating the process once more.

As mentioned by @thelord23 it also can be used during the launch of a clan chest to increase the chance of getting the rewards.

Solution 2:

When you have lower rank it is easier to get 3 crowns per battle, Usually people do this just before clan chests. They can contribute easily and quickly to the clan chest's total crowns.