I've thought about this a lot, but the stumbling block for me is getting services onboard.
The problem is that subscription services make billions annually on forgotten subscriptions. None of them want an easy "disable" slider next to their name in a convenient app. It also makes à la carte subing easy, where you sub for a month every few months to "catch up".
Basically, good luck getting an API with an easy unsubscribe command from any subscription based service.
I think that this happens to be the case now, but is not an intrinsic property of humans. I think that we're living in an age where most consumers have been "programmed" to expect things for no financial cost and only a privacy cost.
The key word here is "programmed" - and what has been programmed can be deprogrammed. I honestly believe that we can re-rehabilitate people to no longer automatically give away their privacy for a service, and instead consciously and carefully assess the financial cost vs. utility of a service.
This could lead to both a reduction in the amount of available services (as smaller ones go out of business because people realized that it wasn't really worth it for them) and an increase in the number of services people are actually willing to pay real money for.
Also, if the subscriptions were far cheaper (say, $2/month), I think that 20 concurrent subscriptions would be acceptable to many people.
The problem is that subscription services make billions annually on forgotten subscriptions. None of them want an easy "disable" slider next to their name in a convenient app. It also makes à la carte subing easy, where you sub for a month every few months to "catch up".
Basically, good luck getting an API with an easy unsubscribe command from any subscription based service.