I dunno how this differs from many scratch-card inserts in many magazines that invite you to see if you have won a prize and ring a premium rate number with the small print informing you calls cost a pound a minute and can take as long as 4 minutes. YOU KNOW they will take longer. If there is a difference it is the professionalism and pervasiveness.

Unless there is a stataury duty to register raffles (which those aren't) &/or prize draws.