Been seeing the same bot - always coming from the bot-riddled Amazon servers. Considering the source it's probably just another spam harvester or content ripper.
I Googled it and only found 2 or 3 posts regarding it. Which is weird, because it's hitting just about all my sites (on different hosts), especially my ePN (eBay) sites. Amazon AWS is a cesspit. I'm tempted to block it completely.
Got hit again from 107.21.82.23 cidr - 107.20.0.0/14 10 page requests in 7 seconds. It ignores robots.txt and doesn't identify itself = ban