Double Fever Mode is not working!

Each Double Fever Mode can be different. For example, one might offer 2X points for Tournaments, while another might not have this perk but instead give 2X Party Bubbles. Some can have them both and lots of other perks. 

Double Fever Mode has a timer. When the timer runs out, you can extend it using Cash. If you choose not to extend it, the doubling effect will end.