The software also allows you to preview the files before recovering them.
This sounds pretty good, right? You can also select the relevant alphabet to drill down the product list for the purpose of the serial key.
Repeat step 1 to step 6 with a new email account and a new credit card endlessly, and you get Spotify Premium for free forever.
Update date and user rating are two important factors that help users judge whether the free serial keys would work or just a waste of time.