To open the Christmas cases, you need to both earn a certain amount of coins and complete 3 offers (including surveys) over $1.
For example: You can open the blue case for free once you’ve earned 10,000+ coins that day by completing 3 offers worth $1 or more. Please see the 2 examples below.
Example 1
3 offers over $1
You can open the blue case
Example 2
Only 2 offers over $1
You can not open the blue case