Some hours later, exact same problem: First page load is fine, then after a force-refresh the site stops responding even to curl. So not a coincidental problem

Some hours later, exact same problem: First page load is fine, then after a force-refresh the site stops responding even to curl. So not a coincidental problem with the site being overloaded, perhaps they've misconfigured some kind of "No Non-Austrialn IP's Allowed" system? Maybe next time I'll try accessing their "Contact Us" page, and gradually find a way to notify their staff. :P