No such thing, these survey sites are a scam to steal your info/money.
This is a discussion on Skype premium generator within the Real Life Hacks board part of the Entertainment category; Everyone knows about skype, but the ability to share screens in a group call is becoming popular these days. Can ...
There has been a thread in the freebies section that allowed you to receive premium keys for free.
There is no such FREE thing when it comes to a question of PREMIUM. If they said so then they are a big scam.