I think now I understand why apps exist that track subscriptions and give you suggestions on which to cancel.

It seems "normal people" subscribe to damn near everything that they get more than an hour of use out of. Subscribing to a productivity, social media, or shopping app?? Those things already harvest the fuck out of your data and sell it to the lowest bidder. The only things I have ever considered subscribing to are health/fitness apps or streaming apps (because you have to).

How are people affording having 20 subscriptions to stuff they probably barely use?

Most should offer alternative support options, even if they can't promote them directly in their apps (a monopolistic practice on the part of app stores), given that forking over 30% of a subscription's cost to Apple or Google isn't something I'd want to do just to support an app's development.