We're aware of an issue with Facebook purchases for all King Games and our team is on it. π οΈ Hang tight while we fix things! You can still enjoy the game, and we'll keep you posted once it's solved.
@King3107, the rules for joining Score Clubs in Candy Crush Friends Saga can be found on page 1 of the relevant discussions. The reward for meeting those requirements is a unique badge on your community profile.
Please be aware that unearned badges will be revoked.