Furthermore, spam is rarely targeted. If it was, spammers wouldn't need to send hundreds of millions of e-mails. And I doubt it works that fast. You visit some suspicious site one day and the very next you're bombarded with "several spam emails". Lastly, I don't see how legitimate art businesses would tolerate spam. I'm an amateur art collector visiting dozens of art sites for years and I've never received spam.
The guy is obviously talking out of his ass. Which is a shame because he's trying to make a good point.