Amazon Route 53 is $0.40 per million DNS queries - which would terrify me if I used it, considering a typical 10Gbit server connection hosted at a unscrupulous

Amazon Route 53 is $0.40 per million DNS queries - which would terrify me if I used it, considering a typical 10Gbit server connection hosted at a unscrupulous ASN with no egress IP filtering is capable of sending a million DNS requests per second from random spoofed IP addresses.