I've used this method personally a couple of times now for both steam giftcards and digital steam keys and it's super easy.
This might seem like a long guide, but if you make sure to follow every step you will be able to get ANYTHING FOR FREE. 
 

LEECHERS WILL BE REPORTED MANUALLY AND BANNED. 

 

It took me some time to write this guide so any form of feedback will be appreciated. Please don't reply with simply "ty" as those posts will be reported and banned.

 

 
 

LEECHERS WILL BE REPORTED MANUALLY AND BANNED.