Hmm, isn't Jonathan's blog post just an advertisement for a few e-commerce links on his website - catering to anti-SOPA-crazed technologists that will upvote this post and buy his songs while they're there?
Anyway, people don't change overnight. Once you train people they can find pirated content for free, they'll continue doing this - and it's very hard to compete with a torrent search site.
For as long as I've been following his blog, he's used it to talk about things he wants to talk about. If he's touring, he'll likely post about touring. Lately he's been organizing a cruise, and he's been talking about that. He also just released an album -- I don't think it's unfair that he post about that on his blog.
I have seen examples of people attempting to "cash-in" on the SOPA outcry, but I do not believe Jonathan Coulton is one of those people.
Anyway, people don't change overnight. Once you train people they can find pirated content for free, they'll continue doing this - and it's very hard to compete with a torrent search site.