Is the royal pass really worth the 13.99?

You will receive random amounts of coins, boosters and minutes of Free Play time.

You can also tap on the chests to see what’s inside without opening it. The ability to see what’s inside the chests helps a great deal, especially if you’re ready to log off for the night and that particular chest contains 15 or 30 minutes of Free Play, or 15 minutes of Free Bombs, etc. You can save it until you log on the next day or whenever you’re ready to play again, rather than wasting it.