One of my clients just blew through his bandwidth allotment because a crawler identified as "FatBot 2.0" from a company called "FatLens" hit his site hard for four days. Several days there were over 9,000 hits (it's a big e-commerce site) which is pretty excessive.
The IP addresses are 64.124.140.150 through 64.124.140.154. For much of the last three days, it was using all 5 IP addresses. I've banned the IP addresses, sent a peeved email to their contact address on their website, and scraped together enough bandwidth to put the client back online.
FatLens, according to their PR, has been a ticket comparison site ("find the cheapest ticket to x event") and they are rolling out comparisons for more products than just tickets. So, as a result, they are crawling more sites. Until May 25, they only occasionally visited sites I manage but something changed for this one client that day.
If I get any response from the company, I'll update this post.
Bill Madill
bill at synotac dot com