Sure it's a good idea. That's why this type of service already exists --
https://www.bankrate.com/finance/credit-cards/6-free-tools-t...
https://www.bankrate.com/finance/credit-cards/6-free-tools-t...
Which one have you used? PS Thanks for the feedback - TrueBill got acquired by rocket mortgage.
If you can make actually cancelling these easy, you probably have a good idea.