I have a method also , just checking to see if they are the same lol
Close but i use a real Debit card i got from CVS that only has 81 cents on it , they can never charge me so i never have to worry about canceling and i get all the extra channels HBO and Showtime etc... sometimes i do that method every week so i can keep those channels going. I should mention that as long as there is enough money on the card for the trial you can get free trials from audible as well , i use inaudible app to take off protection then return books as much as i can. the only trick is that you can't use the same cc for 2 trials but if you put in a fake cc then replace it when they tell you the card is no good, then you can get multiple trials with the same card over and over , btw first method also works for google play music