Ooh, evil. Blockbuster, which has been trying desperately to horn in on Netflix territory, is tempting users to ditch Netflix by promising one free in-store rental for every Netflix address label you bring in. This move comes after Blockbuster announced last month that it would be offering free in-store exchanges for its own customers who were renting DVDs by mail. According to Reuters, the Netflix offer is Blockbuster's attempt to try to meet its goal of 2 million subscribers by year's end (Netflix is projected to have more than 6 million subscribers by that time). The Netflix address label offer lasts till December 21, so if you're interested in seeing what Blockbuster has to offer, do it soon.