The PlayStation Network takes gaming to a whole new level which is why people from all parts of the world are keen on being part of the network as there is a lot that they can do on there apart from simply playing games. As far as games are concerned, there are far too many that you can spend time playing so much so that you might not even be able to try out all available games within the limited time that you may have available.
So I guess PlayStation is a popular network which compares well with the Xbox Live gaming system. Unfortunately for those who are used to freebies, the PSN network is not free as you will be expected to spend money to have memberships on a regular basis.
Apart from membership, there might be other bits and pieces that may require you to spend money again. If you cannot afford to pay for PSN membership then there is a better way out for you which offers you a free option of proceeding further playing your games on the PSN Network full membership.
You can do so through the use of free PSN codes which are available through a number of websites. There are also PSN code generator tools and programs available that would allow you to generate codes as and when needed for your PlayStation gaming needs.