Free trial for PlayStation Plus network card before buying..

Hi, Great news for all. Sony offers the a free trial(14 Days) for PlayStation Plus network card. I already have bought a Sony PlayStation Plus network card from a online store 4saleusa recently. Just a few days I am using that card. Downloaded games only still now. Before to buy it I did not use any trial. Actually I did not heard anything about the free trial somehow. Whatever I did not face any problem still but need to know any more idea to use that card. Thank you very much.

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