As it turned out that my previous blog post is first returned by Google while searching for this company, I got some feedback about them. They seems to send spam, attempt to steal site keywords to get before them and do other simmilar silly things. If you want to know more, just try more Googling or read discussion.
If you want to fight them, either block them by iptables:
iptables -A INPUT -s 208.66.195.0/28 -j DROP
Or deny access to webserver (this example is for lighttpd I use):
$HTTP["remoteip"] == "208.66.195.0/28" {
url.access-deny = ( "" )
}
