Very smart move this, rather than to figure out how to monetize it monetize it by selling it while the growth curve is still exponential. Also, looking at alexa it seems as though the period of hyper fast growth is already a bit past: http://www.alexa.com/siteinfo/threewords.me Still, it should fetch a pretty penny and to the right party it might be worth quite a lot of money.
Now having seen a wider window of stats on the site from quantcast, all arrows are pointing down and to the right. I agree that he's smart to try to sell it, but only because the longer he holds onto it the less opportunity there will be to capitalize on the original spike.