Hi @hyangACA
We warmly welcome you to the Friendly King Community's Candy Crush Saga forum.
The feature you are talking about is provided completely free of charge through the test group. Not all events/ offers are for everyone. Before any change is implemented a randomly chosen group of players is selected to trial the feature, and based upon how the change is viewed king then decide whether the change is one they want to adopt or not. This feature has been rolled out to different players for a certain amount of time but not everyone will receive this.
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