PSN cards are similar to prepaid cards in function. They both provide people the ability to purchase or buy promos through the form of load or e-cash. Depending on how much the card you bought is the equivalent amount of load that you will receive. In order to advertise their promos and products, the company that releases PSN cards give out free PSN cards every now and then. But because the ratio of the people that visit the PSN website to the released free PSN cards is not 1 is to 1, then not everyone could get their hands on a free PSN card.
But if you really want to take your chances, you could always try your luck through other giveaways and free e-cash in PSN like free psn codes generator. Unlike those legitimate PSN cards release for advertising, the codes generated here are not of the same value, and could sometimes even be of no value at all. Take also into consideration that the higher the value of e-cash, the smaller the probability that an equivalent code would be generated for it hence, the average amount that you are gambling for is around $20. Although the average amount is not that high, there are still chances where you could win a more valuable card than you expected or even a PlayStation Plus Card which is now more than what you bargain for. What’s even better with this code generator is that it is not limited to one try per day, thus you could try your luck a multiple number of times.