There are a lot of sites (dozens, maybe) that I would be willing to pay $1-$10 a month for, except that I'm not willing to sign up for all of them individually,

There are a lot of sites (dozens, maybe) that I would be willing to pay $1-$10 a month for, except that I'm not willing to sign up for all of them individually, and not all of them are willing to sell me their information/services at a price that matches the value that they provide. It's not worth my time to manage each of those subscriptions on its own, and there isn't really a good way to manage them centrally, from the same interface. The money is almost certainly worth it, but the time involved almost certainly isn't.