The monthly subscription only make sense if you consider that new data brokers are popping up all the time and opting out is a constant process. That said, it seems like 90% of the value you get from a one-time usage, but of course they insist on a subscription.
But my solution to that is to use a burner credit card number! Specifically from privacy.com. I just make a new card with a limit of $20 to ensure it can't be billed again next month. I should of course just cancel the subscription, but if I forget they can't charge me next month anyway. I highly recommend privacy.com or other burner card services.
https://news.ycombinator.com/item?id=30605010