Contacted this user on skype! NOT FOR A VOUCH COPY!
The user is using a private method.
He said he generates fake visa numbers or bank card numbers which is pretty easy! Than with his method he can get you 30 day trial of spotify and he can also renew the subscription.
This may seem like carding but he has proved its not
He insisted to do a free upgrade for me, and it did work on my account which already went through the trial period! This means the user can renew your subscription even after trial
My vouch goes for this user!
(Also, I'm not staff and I know the rules, but intentionally I contacted him to ask if its carding or not and some proof for it and he did show some valid proof and than he said he would do one for free which is not a vouch copy! just out of kindness)