Cruelty would imply a conscious, sentient subject, you can't be cruel to a machine. At best, you can be careless in your use of a tool, causing premature wear and deterioration.

In this case, you could theoretically argue about being cruel to the human operator behind, but that's quite a bit of a stretch. They gave billing access to a poorly controlled machine.

And that is a good thing. What the human operator did was completely irresponsible and malicious, paying a small bill is hopefully educational and will correct their behavior going forward.

Having agents like this interacting with human communities is a scourge that must be prevented. With every passing day my longing for a Butlerian Jihad grows firmer.

I had no problems subscribing to stuff through wise or revolut cards. Both are prepaid as far as I'm concerned - they won't let me spend above my account's balance.