They have been implemented to ensure that the deal between customer and casino is as fair as possible. It became apparent to the UK Gambling Commision that some deals could be considered misleading, as although they claim to be “Free”, they require further investment so aren’t technically free. As such, casinos have implemented them to make sure that no one is being misled and that their players get the fairest deals possible. If you find a casino with wager free spins, then you can be sure that you are at a casino that is throwing straight dice and there is no wool being pulled over your eyes.