Valid points! I do create a separate email (proton has an alias generator and allows unlimited if you pay), credit card, and phone number for each service. Adds about 90 seconds to each sign up, which is a great chance to ask myself if I really need that service .

X1 (and I bet there are others) have a button called "free trial" cc that generated a real, valid anonymous (j doe) cc that cannot be used for an actual charge. When I pay for things (I do), I creat a separate virtual card for each service. Side benefit is when I want to cancel, I don't have to find the dark-pattern account cancel button. I cancel the cc and the email. No more subscription; no nagging.