Generally speaking, a presale is a “sale held or made before an item is made generally available for purchase”. What it means for our sites is that we take orders leading up to a specific time/date and we hold all of those orders till that time/date expire. Once it has expired, we give the item counts to the manufacturing team and them make/pack/ship the items out.
This process can take up to six weeks after the presale ends to complete. So for example, if you bought a T-Shirt during a presale that is scheduled to end on 7/31, you shouldn’t expect the shirt to ship till around 9/11.