To be honest their service is so cheap, that it's extremely unlikely to get such an attack without costing the attacker an equally equivalent amount. Also, if

To be honest their service is so cheap, that it's extremely unlikely to get such an attack without costing the attacker an equally equivalent amount. Also, if it's really a problem or you are estimating it'll certainly be a problem, do email alerts or a strict shutdown if xx requests are hitting your account. You can have a simple counter in a KV.