What are the service fees mentioned in the terms and conditions?

At Boomerang, it is free to create an account to become a member. We offer both free and premium (meaning at a cost) workshops online. The service fee refers only to the cost of the premium workshops. This cost is listed before you register, and no payment will be taken without you knowing. If you choose to register for a free workshop, you are not prompted to enter any personal payment information (like a credit card number), so you won’t be charged any fees as the workshop is free.