While getting some false positive failures from Pingdom I noticed that I banned your IP 52.209.34.226
That is because your IP doesn't verify to a Pingdom hostname; instead, the IP hostname shows amazon domain.
Most of your other IPs point to a Pingdom hostname, but you might want to check this IP and others too. Instead of adding all the IP Addresses, we should be able to verify your crawlers via hostnames.
