What are "Token" for and how to get them?

The Token is the special resource you need to join the Pitch Challenge. It does not automatically retrieve from time to time. The Token only will be full when you get a level up.

There are 3 ways to get more token:

1. Get the Token as the reward in Voting
2. Join the special events to get it
3. Press the "+" button next to a Token icon to buy it by Gems.