That contract you signed with Adobe has residual value when they give up on charging you. They don't just move on, they sell it to a debt collection service and then you will really learn about aggressive tactics.

What are these aggressive tactics? Are you talking about spam-like contact attempts or some kind of gangster type activity?

Caveat Emptor. I subscribed to Revolut "Premium" in order to have unlimited disposable virtual cards but changed my mind since and they too charged me the cancellation "break fee". Apparently everyone is using this tactic these days.

As if subscriptions weren't consumer unfriendly enough.

This is a super effective way to get debt collectors sending you messages!

It depends on the company and sales contract, but as you signed up to an agreement for the subscription on these terms it's possible that Adobe would be able to sell the unpaid fees off to collection agencies.