To all who here cheering: "SAVE SAVE SAVE!" - Considered it out .. Your "save" more than 10%, must it but go in advance, have a very limited product range (only apps and digital books) and at the end of the spending spree still remaining balance on the account that you can not so quickly deplete smooth ... and then buys coins and the game starts all over again ...
So in my humble opinion is (at best!) 10% discount on the offered simply too little.