[evermike]

Neobanks definitely have this feature. For example Revolut. There’s a “Block future payments” button, and once you click it, no more charges from that merchant will go through.

[amelius]

Yes, but this is not a correct way to unsubscribe. They might for instance still send a bailiff to collect their money.

What I'm talking about is an official way to unsubscribe. One that the user fully controls, and is free of dark patterns.

[robertlagrant]

What if you want to change your subscription level, rather than unsubscribe?

[lixtra]

The requested feature is more like list-unsubscribe headers for mailing lists[1]. Instead of categorizing the mail as spam (blocking) you send a clean unsubscribe back to the sender.

[1] https://www.twilio.com/en-us/blog/insights/list-unsubscribe