Audible Subscriptions and Kindle Unlimited
If I spend 12 CHF per month on Netflix or 23 per year on CuriosityStream I think little of it. I expect to watch films and TV series once, and then to forget about them. With books and music I feel differently. With books I feel that it is worth paying for Unlimited if I read more than two books per month. With Audible.com the story is a little different. When every book is 25 USD or more, it makes more sense to pay for the subscription.