Use privacy.com and give them a temporary credit card. Close the card when you want to cancel.
Is this ethical? You're not using the software anymore, so you're not getting something for nothing. Rather, you're avoiding paying something for nothing.
Is this ethical? You're not using the software anymore, so you're not getting something for nothing. Rather, you're avoiding paying something for nothing.
Are the seller's terms unethical? Perhaps. I don't think that justifies being unethical in response, though.
Arguably the PayPal trick is more ethical because they decide it's not worth chasing the cancellation fee.
Trying to generalized actions are unethical or ethical or more or less ethical is completely subjective based on your understand and acceptance of the society rules you have been exposed to.
Company work with objective laws with judges deciding disputes.
With pirating, you're continuing to use it without paying.