The Pirate Bay seems to be getting a lot of help. Earlier this year, the MPAA raided their data center and seized a bunch of equipment. They made a very big show of this bust, telling everyone how they took down The Pirate Bay. A few days later, the site was back up and running in a new home, and had a bunch more traffic thanks to the MPAA.
Now a similar thing is happening in Italy. A prosecutor over there has told ISPs that they need to start blocking The Pirate Bay. The site has already worked around the blocks, and now they likely have even more traffic as a result of the attempted ban.