As of today the price of free delivery on Amazon products has been increased.
In July 2013 Amazon introduced a minimum 10 spend requirement to qualify for Super Saver Delivery, although a number of items such as books, DVDs and, crucially, games were exempt. These exemptions were then scrapped in January 2014.
Now the minimum Super Saver Delivery spend has been increased to 20.
Part of the reason may be to encourage shoppers to pay out 79 to upgrade to Amazon Prime, which offers automatic next day delivery on all Amazon stocked products, as well as access to Amazon's video streaming platform.
Prime membership was itself increased in price last year, having previously cost 49.99.