A player can spend real money to purchase something that gives them an advantage in the game.
"They do bundles that give you a lot of progress for an amount of money and you can do that as much as you need."
"Kind of. You use real money to purchase new card packs, which often contains more powerful cards."
"Spend coins on extra letters and a spell checker to let you know when you put something wrong in."
"You can buy energy and gems to progress further in events. You also have to spend money to get access to certain seasonal stories."
"There is a "dream master bundle" that boosts you, such as increasing your cap to 5, making the first dream of each day new and boosting your chances of a new dream by 10%. It isn't a multiplayer game but it does give you an advantage"