For the 23rd edition of Wacken Open Air, the sale of an "X-Mas Package" started on Monday, 8 August 2011, shortly after the end of that year's festival, and was sold out within 45 minutes. The event sold out ten times in a row between 2006 and 2015. Tickets for Wacken Open Air 2015 sold out after just 12 hours on 4 August 2014 – just a few hours after the end of W:O:A 2014. The X-Mas Tickets for W:O:A 2016, which cost 10 Euros less and whose buyers were entitled to a free T-shirt, were completely sold out only 20 minutes after the start of pre-sales. Booking office Metaltix’ servers were highly busy. In the minutes before the start of the pre-sale, the pages were no longer accessible; after that, data traffic had to be limited by wait lists.