Go to this luhn bank-card generator - here
Enter the BIN: 534642
Generate 1 random bank-card with the bank identification number of 534642.
Register on Spotify and then choose country Angola, enter the bank-card and begin the Spotify trial.
Explanation and Analysis:
This is not carding, or complex in any means necessary, this is an example of binning payment gateways in which no specific individual is affected. Binning attacks are the act of finding vulnerable banks which authorise cards even when they do not have an owner, they normally fail all paid payments (if you are not into extrapping).
This is an example of a binning attack which works on Braintree, any generated card from this BIN, on a braintree gateway will pre-authorise and give the response (1000 - Approved). Allowing individuals to signup and make use of a free-trial.
Extrapping is the act of taking apart a bank-cards pattern, not one specific individual is affected, and can allow paid payments to be authorised from cards which are owned by no one, the payment provider however approves the payment. An example of this is in September 2019, in which a corporate amex was extrapped, which allowed thousands of people including myself to make payments on cards which were owned by no one. I made great use of the vulnerability for two weeks buying 1 Million reddit coins and then giving them away for free, est. worth of $2000.
Hope this helps you grow your understanding, of binning, extrapping!