Smart idea. Cancelling my prime membership also.
For a company that is known for the one-click-buy, they definitely make it hard to cancel.
Had to go through app - website - German website ( that's a first) - "click here to cancel" ( doesn't do anything, but found something on the same page "I do not want to use my advantages" does seem to do the trick).
I kinda hate what some companies/people are currently doing though.
Also, some people are really stepping up like Bill Gates, but I don't know if it will be enough.