Thanks! This is the fifth time happened, only in notifications, and one is this: https://community.king.com/en/candy-crush-saga/discussion/comment/3328597#Comment_3328597
Hello and welcome to the community! The ads feature is temporary. The feature is not rolled out globally at the same time. Therefore, you have to wait until it's your turn to have the feature and enjoy boosters again. Thank you for your patience!