LPT: You can use gift cards or your Apple Cash card as a credit card for product trial and subscriptions
Online trials often require you to submit credit card information for the free trial, banking on the fact that you will forget to remove it so they can charge you as soon as the trial is done, regardless of if you were satisfied or not. Some places also make it difficult to remove your card number for their files. You can get pre-purchased gift cards so that those companies can't have direct access to your line of credit. For any iPhone users, it's even more coinvent to use the apple cash card.
Bonus LPT: You can cancel the trial immediately after you sign up for it. You will still get the free trial period even after the cancelation.