Amazon being down surely points to something other than Fastly being the cause?
$ nslookup images-eu.ssl-images-amazon.com
Server: 127.0.0.53
Address: 127.0.0.53#53
Non-authoritative answer:
images-eu.ssl-images-amazon.com canonical name = m.media-amazon.com.
m.media-amazon.com canonical name = media.amazon.map.fastly.net.
Name: media.amazon.map.fastly.net
Address: 199.232.177.16
Name: media.amazon.map.fastly.net
Address: 2a04:4e42:1d::272