What's an entry fee for a tournament?
The entry fee is the amount required to join a tournament.
For example, if a tournament has a $1 and 600 Gems entry fee, you'll need at least $1 and 600 Gems in your balance to participate.
You can see the entry fee for each tournament displayed on the right side in the lobby. Once you enter the tournament, the entry fee will be deducted from your balance.