That's the kind of thing I'd pay 10$ one time to get.
I'm certainly not paying a netflix subscription for 3 svg backgrounds
In your case at $10 per image, wouldn't a $15/month subscription be a good value if you got 2+ images (a value of $20+) — assuming you cancel before being rebilled?
Or are you saying, regardless of value, having to cancel isn't worth the hassle?