…yes, well, it’s quite common for people to pay others to do things that they could do themselves but would rather just do something else. That is kind of how the world works.

I don't think that the GP was necessarily complaining about the money, but about the inconvenience of the payment.

> Having to provide an address and a credit card

You don't usually complain about providing an address if the only factor is the payment/price.

I suspect the GP would have been fine paying if they had an extremely low-friction payment system (e.g. one-click).

Also, in the case of pure art, paying for something trivial is like voting.