Making it more specific only invites malicious compliance. If businesses TRULY make a good faith effort, they’ve got nothing to worry about.
For example, finding a loophole to keep it difficult unsubscribe. Or making it easy to unsubscribe, but adding an egregious cancellation fee to all subscriptions.
Another good example is when NYC passed minimum pay laws for delivery drivers, and the big delivery companies immediately all colluded to hide the normal tip screen behind a bunch of submenus (until eventually forced to change it back).
Is it really unclear to you what the intent is here? What specifically about the rule do you think is ambiguous?