We're aware of an issue with Facebook purchases for all King Games and our team is on it. ๐ ๏ธ Hang tight while we fix things! You can still enjoy the game, and we'll keep you posted once it's solved.
I usually try to get to the podium without using my GBs and I know when to stop. Unfortunately, this type of event is not playable for those who are very high up on the map.