About the eShop, it is possible to acquire all the games (for different systems) as well as other applications. Of course, for this purpose a credit necessary and here the prepaid cards come into play. I myself found it for example in the Playstation Network always burdensome to require a credit card -. Prepaid is easier, more child-friendly and also gift-compatible. Incidentally, that Sony has now jumped on the prepaid train. The eShop Cards in any case serve their purpose. They are easy to register and the balance is immediately available. The price-performance ratio in the shop itself is okay, although I find that 3.75 per GB-game would be a better price, because you could earn 4 games with 15 card in this way. Actual 3.99 per game are probably Nintendo's method, make sure that the buyer is at least plays with the idea to acquire in the near future another eShop Card. What I do with the best intentions can not tolerate is that the cards on Amazon.com cost more than they're worth. Why should I spend 15 credits 16.99? There is a marginal amount, but a medium-sized nuisance, because if I boot my prepaid cell phone, I finally get to 15 and 15 call credit.