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The Gold Digging Challenge is a challenge where the members of an investment group can participate in order to increase the income of all members that are in the group.
In order to complete the challenge, the group members need to mine a certain amount of gold which is dependant on the mission level.
When a member begins the mission, he gets 30 seconds to tap as fast as possible.
The amount of gold mined per tap is equal to the group wealth, and this means that all group members do the same amount of help if they tap the same amount of times.
After a member participates in the challenge, he must wait an hour before participating again. He can rush the cooldown of the challenge by spending 100 diamonds.