When blue apron first started, you couldn't even cancel it through the web interface -- You had to send an email to request cancellation.
edit:
Blue Apron still uses these slimy tactics. I created a screenshot [0] of the Blue Apron cancellation page [1] (in case they change it.) Look at how difficult they make cancellation! The question is literally, "How do I cancel my account?" and the answer should be a simple button to cancel. Instead, the first paragraph tells you not to cancel, just delay, and then the third and fourth paragraphs are just additional needless text.
Then, when you email them to cancel, they don't actually cancel your account -- they send you a link to the cancellation page. Why do they require you to email them to get the link? Why don't they just put it on the FAQ page? The answer is that they're using slimy tactics to increase friction and demotivate you from cancelling.
[1] https://support.blueapron.com/hc/en-us/articles/203146687-Ho...