The Pirate Bay, Mininova and isoHunt all have millions of visitors every day, searching for music, movies, software and especially TV-shows. Together, the three BitTorrent sites serve an impressive 500 million searches each month, and this number is going up every month.

The Pirate Bay, Mininova and isoHunt combined achieve over a billion pageviews a month. These are quite remarkable statistics when you consider that together, the trio run on less than 100 servers (cf. Facebook has 10,000).

Despite all three sites being involved in lawsuits, they continue to attract more visitors, and thus more searches. Mininova and The Pirate Bay currently process between 7 and 8 million searches per day, roughly 230 million a month. isoHunt isn’t far behind though, as its users perform 6 million searches every day, totaling some 180 million a month.

As Slyck points out today, the larger BitTorrent sites are getting as many searches as eBay and Amazon. When combined, the three BitTorrent sites are good for half a billion searches every month, which equals half of MSN’s total search traffic (and 5% of Google’s searches). The major difference though, is that the BitTorrent sites are still growing, while Microsoft’s search engine traffic is declining.

Even though most people use BitTorrent to download TV-shows, the latest Hollywood blockbusters such as Wall-E and The Dark Knight can also be found among the most popular searches. An interesting trend worth mentioning is that more people are searching for high definition content, as ‘720p‘ is a recurring term in most site search clouds.