All articles in this shop are free of delivery and shipping costs, because they are all digital products which you can download after paying.
There are free demo versions of every product with reduced features. So consumers can test the most important features. Doing so, they can check whether the product is up to the mark, or not. (There are extracts of ebooks and audio tests of MP3s.) Because of this reason, a redemption of the full version is impossible.
The customer accepts these conditions, buying products.
