My only explanation for why it needs to be so expensive is that it needs to be a large enough charge that the rightful owner of a stolen credit card might notice it? Because it’s in and of itself an author verification? If that’s the case though, they could refund some or all of it after say 3 months?
Even then, just as a verification, there seems like very little need to charge for that verification annually. It really just seems like rent seeking.