This website is part of Hostelworld Group. You can see on the first page:,, no booking fees, no service charge". It's a big fat lie, but European commission don't care.
Hostelworld is the worst booking platform ever. This company Hostelworld group should be investigated by each government around the world. I wouldn't recommended to anyone. Stay away from this Hostelworld.com, hostelbookers.com, hostels.com owned by the same company!