By upgrading the Lucky Panda Temple you have the opportunity to unlock Spin Multipliers. These will use your Spins at a faster rate - but also multiply your rewards. Don't worry, Progressive Rewards also advance faster as well. Tap on the multiplier gem to change the setting and try out higher multipliers!
x1: uses 1x Spins and Gives 1x Rewards
x2: uses 2x Spins and Gives 2x Rewards
x3: uses 3x Spins, Gives 3x Rewards, merges your winnings if possible*, and has a 50% chance to reward an extra item!
x5: uses 5x Spins, Gives 5x Rewards, merges your winnings if possible*, and gives you twice the merged output!
*If the item is not mergeable you will receive 3 or 5 of the item
The multiplier also multiplies any progress you earn toward the Progressive Reward.