This is adobe's whole schtick with the cancellation fees for example. You pay 50% of your remaining subscription balance as a termination fee. So if you subscribe 3 times a year for a month and then immediately cancel you are paying more than a yearly subscription.

Bill per hour would be OK.

Or buy once, give me 1 year of free updates but I can use it as-is forever (like intellij) is also fair.

Adobe does offer monthly subcriptions, but for individuals only.

But some of these subscriptions, including the one I think this thread is about, will obligate you for a period of time. This happened to me, signed up to a trial of Adobe to test a graphic designers pc, once it ticked over to paid, I was told that I had a 12 month sub, just billed monthly. (I screeched and pulled my hair out and went all karen and they ended it, but they wouldnt do it twice)

The "Apps on Tap" enthusiasts got absolutely mogged by Adobes commercial reality.

To cancel, you need to immediately pay out 50% of the rest of the year. And you’ll lose access to the products at the end of the month.

So unless you’re not even getting 50% of the subscription cost worth of value out of it, it pretty much makes more sense to continue it and cancel just before renewal.

As soon as you run over that 7 day trial, you’ve got a 30 day window a year from now where you can cancel without penalty. Miss it or forget? Set a better reminder for next year…