I fail to see what exactly is different from the other emails filling up my junk mail folder? They are also few lines long, sent from a person unknown to me, refer to my site(s) and contain links to external sites that have suggestions for optimizations. Many of them refer to me with my name, either taken from whois info or from the site.
Yes, I agree...it's just spam. I certainly would never respond to this spammy crap. In fact I now never respond to any company spamming me, because in general they tend to be evil in other ways and provide a crappy service. If I want something, I'll do my own research.
